Then, disable DNS Client service. Browser connected to internet perfectly, blocking ads with host file, and Svchost. In my case I was using a very large hosts file from the Supertrick suite to block ads from my browser.
For the longest time the hosts file caused no problems. The Task Manager showed svchost. If I killed the task I could connect. But this was a pain in the ass. If I deactivated the host file I did not have the problem but got the ads in my browser. The culprit wound up being the DNS Client service being on automatically and apparantly keeping cache of entries in very large hosts file.
Use ProcessExplorerNt! Therefore I have killed totally ugly made fax service of Windows XP — now silence! One of the programs you recommend for cleaning up the registry is PConPoint. I bought this program, but it has not gotten rid of the error message I get after startup. Repeated emails to their support have become circuitous and we are now back to stage one. All their email replies appear to be canned messages with no personal response.
It appears no one speaks English, or at least there is no attempt at a personal reply. I feel I have been cheated by purchasing this software because nothing has changed in my computer. Hello there! Thanks for the great article about the svchost problems, I had this problem and the microsoft fix did patch it.
It would be interesting to know how exactly to fix the problem. I compared my services list with the one of an uninfected machine and found no difference, so I dont think the trojan adds a new service. Also it seems to me that svchost is required to have internet access — as soon as I prohibit access of it in zone alarm, my whole machine was unable to load any webpage or use any internet application.
Its a highly annoying thing and at the same time it would be interesting to find out even more about it, and how to permanently kill the remaining ad and spyware and virus programs. Anyway, great article, helped me out! What is it? Is it legit? Should I permit access. Sometimes it make four attempts for every one denial then after that I can no longer connect to the internet.
Usually closing my browser, then restarting it enable me to once again get access to the internet. But what to do in our case? After that our application could not run. One of the reasons was Firewall which is On by default. To solve this problem, we made exceptions for application, but also for port which is used by DCOM it is not running without that port. Now our application is running but what about vulnerability of port ???
Leo thanks mate for running this thread. Just shows that this is a major problem. Well thanks to you and Eric, I got my svchost sorted. I also use process guard and wormguard, spyware guard, spywareblaster, TDS-3 with the last update, was using free version of ewido, scan regularly with Adaware and Spybot Search and Destroy and Acronis Privacy Expert. Despite all this I ended up with this problem.
So maybe not a virus or spyware issue here. To sort it I cleared my dns cache and disabled the DNS client. Then I clicked on start and run again. This time I typed in services. I found the DNS client, right clicked and selected properties. I changed the startup type to disabled, clicked ok and exited services.
Rebooted and connected to the net with no delay and no freeze. Almost as bad as packing a parachute with no D-ring: svchost. Leo: Thanks for this thread. This usually happens when I am trying to play a game from Jigzone.
But, I get around it by disabling the process and then restarting afterwards. It is very annoying. What I wanted to say though is that none of the virus scan or anti-spyware detected a problem and the firewall is on all the time. So, what else can I do to fix this problem? Hi Leo, Excellent article — most informative. I have a new twist. When I did a Google search on this, I came across a discussion about this error.
I have checked for all the recommended settings in the browser IE , but no luck. Any suggestions would be MOST welcome! George G in sunny Sydney Aus. Might see if a different browser like firefox will let you download the fix. You should be able to order the most recent Win service pack on CD — that might be an option. I see the same problem as everyone else: periodically, svchost. I have a deskside and a laptop, both firewalled the laptop uses ZoneAlarm , both with NAV updated daily.
Yesterday, I got a new laptop for my wife and after I connected to the network, I started seeing the svchost bottleneck quickly. So, my theory is that the problem lies in network caches being flushed, name servers or gateways getting jammed, or something along that line. Svchost is probably designed with the expectation that it can do a busy wait because it will always get an answer quickly, so if it does have to wait, it chews up the CPU. I think that svchost going to the peg may be a symptom of another problem, not the root of the problem.
Hence, I suspect network issues. Hello Interesting! I am a complete novice. Have had problem for long, long time. After using my laptop for sometime, the cpu goes mad and then the computer shuts down and will continue to do so after restart.
I can help the problem with a usb fan directed onto the intake vent? Anyway, when this happens,I have noticed in task manager that Sychost. This is zero when the problem is not active. I have mcafee and have tried numerous other spyware, virus programs but nothings show a virus.
However, Microsoft Antispyware shows a reoccuring problems of c? I suspect this may be connected to the problem. I have installed Windows Service Pack 4. Everything becomes ok if I restart. I have scanned with AVG Antivirus but it detects no virus. What Shall I do to solve this problem?
Solved: Reading the article, comments, …. It was doing many many context switches and heap-alloc … Killed that process, and now all seems quiet. Remainder of functions are operative in a normal way. Very helpfull site. Hope this helps someone else. Had to reinstall OS after a hardware failure on a firewalled and regularly virus checked machine. Got the svchost. Next I set up Windows update, and was surprised there were only 2 updates, but applied them anyway. It took 2 hours to install them, because of the hogging by svchost.
After carefully checking for Blaster type worms killed the svchost processs 1 of 4 that was hogging. I immediately got a message from the firewall that ntoskrnl. I then Deleted mobsyc. So far, touch wood, the problem has gone away, and windows update has now produced 31 more updates to install.
It is quite possible that windows update itself caused some of these problems, maybe getting something bound up in an endless loop. Please Help Me!!!
Thanks for the great article, Leo! I scan regularly with McAfee Virus Scan and automatically update with the latest virus updates. I also scan regularly with Microsoft AntiSpyware and keep it updated. No viruses or spyware were found by any of these. I also checked my firewall McAfee Personal Firewall Plus and it was already set to block ports , and Is it possible for some sort of attack that causes the svchost.
You might also use process explorer to see which svchost is being affected, and then which services that instance is attempting to provide. This may provide clues. Thanks, Leo. I forgot to mention that I had tried that, too. However, in my case, every time svchost. Basically, the two are related somehow and Windows has a fix for it.
Basically, svchost. Hope this helps! Winpatrol will help nail down what the issue might be as well. I have some strange things going on with access to the internet. It does this for several minutes and then things start to work. Might also be the services of the Fingerprint reader hardware. As soon as I am using the ProcessExplorer and monitor it and start closing update service, the Fingerprint software has a popup error, closes itself down and the CPU goes from 99 to less than I still have to look deeper, I might end up removing and reinstalling the fingerprint software vs repair.
Not sure if my problem is caused always by svchost. My computre is always attached to the Internet, but quite often when I am not doing anything with the internet I am receiving a lot of very long delays.
Software packages I have run for tears will now always take ages to load, coming up with either server is busy, or another program is using the resource I require, giving me a retry or switch option. When I select Switch it always calls up the Start menu. Eventually the program will load, then it runs fine. Also whenever I use the file open, save options etc it takes ages to load the details , often displaying the search icon. Thanks Leo for all you do for the computing public.
My fix is limited to the situation outlined below and does not include the 60 second shutdown issue or crashing. Some websites and forums suggested that SVCHOST is being exploited by a worm or trojan, but most people find their virus scans come up empty as do the spyware checkers.
So your computer is mostly OK except for this cpu drain that seems to last only a short time. My Hijack this has not changed. Apparently the cpu usage is caused by the Updates program attempting to determine if there are updates which it of course only does when you connect to the internet. I did not experiment with allowing it to be ON full automatic mode, but I suspect that would be OK too.
Appears to me that Windows is not playing nice with the Notify me but do not download option. Wanted to let you know cuz lots of folks are suffering. I suspect this is something MS will be fixing in a future update…. When you start your machine, immediately start the Process Explorer, and watch the cpu usage as your internet connection is established.
Regards, Dan. Same thing also happen if i try to view the source code of webpages. Pls give me a solution thanks in advance. After reading about the Windows Update post, I checked the computer that I was having the same svchost.
Once I turned this off, the svchost. I manually connected to the Windows Update site and during the check for updates, svchost. After waiting nearly 30 minutes it finally gave me the option to get the latest windows update software. I installed this, downloaded all the latest updates, set it back to automatic updates every evening and now everything is working fine again. It could be that you have the older version of Windows update, that seemed to be the problem on this computer.
Should SVCHost. Because my network symbol is on all the time even when no net apps is running such as IE? The light is constantly on, does this indicate a violation of the svchost file? Or a modification for a possibel spyware or malware? I have read the articles on svchost. No luck. I have a similar problem to what answered above, but I have used 3 different virus scanners, an ad-aware software, and a registry cleaner.
Yet I still get this problem:. Everything is fine. My only way to reconnect to the internet is by rebooting my computer. I can still play games, work, listen to offline music, etc. Dominic, I had exactly the same issue. Must be something fresh — all the posts on it I found were from the last few days. But I finally found the solution — here it is:. If I end the process, it fixes the problem until I boot-up again. I have the McAfee suite of antivirus and firewall applications. I have scanned the computer for viruses with none found.
Thanks Dominic and Marek. I had the exact problem Dom. I re-installed win. Went to the link Marek posted, downloaded the patch and have been surfing for the past two hours with no problems. Very grateful.
Almost bought a new computer last night becasue of this problem. Student at UTEP. It took long enough to find it!!! That link was what Marek posted. I have a problem when booting my computer. The first time it happened, i got lucky by deleting one of the svchost. So i went in safe mode, and it booted fine! Same problem, only if i erase the svchost, the computer boots and doesnt start the countdown.
This procedure worked well. I used AVG and Zone alarm along with the updates. It worked well. I found that if I hit ctrl-alt-delete as the computer came up I could see if svchost. If I waited too long though I could not get ctrl-alt-del to work. It also gave me the ablility to kill the process in order to shut the computer down naturally without using the 10 second off button.
My computer is running great. I appreciate you taking the time to post this article. You saved me a lot of time. Thanks, Tom. After installing the latest Creative drivers my system began to become slow. I noticed svchost. After rebooting again it seems ok now. Could this be a driver problem? Thanks in advance! At last….. My question is why does MS not make this issue more public so people know about it. It took me over 5 hours to find this post.
Grrrrr Surf. Hi, I was wondering if svchost. I am running a computer with a decent amount of memory 1gb and sp2. I have had the problem with my other computers as well.. No more audio for me. Remove the composant Windows Update in Internet Explorer and restart. It works for me on two computer! I checked my system with anti virus 3 times i formatted my hard disk. There was no virus. Same here, I formatted my harddrive and re-installed XP 3 times now and in about 5 minutes svchost.
It seems to be related to Windows Update, which I want to use. If I end task this particular svchost before it goes crazy, and then try to use windows update again, it runs svchost AGAIN and then hangs. No Windows updates ever show up to install. It just sits there like dummy. Microsoft update does the same thing….
I need Windows Update but I also need it not to hang after 5 minutes…. Hey, surf, how do you turn off Windows Update? I wanna try that and see if it works. Isnt there a product i can buy or something to fix this? Oh, and is this a safe thing to try? After you delete the offending svchost process, the sound goes dead. Removing the sound card driver and reinstalling clears the sound problem.
Running XP home SP1 on dialup line. At first, the svchost was just slowing me down, but now, I have no desktop when I log in; just an empty screen, and I can only use task manager to get things done. I put a program called AntiVir on a flashdrive. I was having the same problems with svchost and.
I had this problem, checked the web, looked for viruses and called microsoft. Finally, I hypothesized that the problem was not something faulty or corrupt about svchost. This elminated the problem. Made sure that my bios was OK — set it to a default state. Defragmented my registry. I turned off ms system restore. In short, I decided that cpu technology had not really evolved that much since the pentium 2 and that I would treat my celeron processor with some kindness. I actually found an even simpler way to fix this problem it was driving me crazy.
All you have to do is 1. Go 2 the start menu 2. Reboot your computer 6. Manually update windows. Turn your automatic updates back on.
Thats it im running windows XP and after days of research thats what worked for me i actually found it on a website that makes you pay for answers to problems but my friend had a subcription that was years old but still worked. Im no computer expert but i figure if this helps one person it was worth it for me to write this hope it helps c-ya bye!!!!
Leo, I have a CPU usage problem. I have called and talked with a techie at the PC store He is familiar with my system He told me to boot up into safe mode then run spybot search and destroy and and an antivirus scan AVIRA guard red symbol with an umbrella on it I did all that and it temporarily took care of the problem. NOW its back again. Thanks for your help. I recently developed a problem with my computer continually restarting.
As it boots, before the desktop comes up, I get several error messages, and then the computer reboots. I have been watching this process, and through frantic writing, I have a few of the errors that pop up: Run.
DLL — Invalid access to memory location. Also, svchost. Any ideas? This is a great site and your identification of this problem is right on. My problem is in trying to fix the problem, I can get the system stable by stopping the process, but whenever I try to do a windows updates the system almost instantly crashes. I can do almost anything else on the internet and download or run almost anything else. I had the same problem then an error about some Generic First i found that you can go into Task Manager and just end that process — and continue gaily along OK.
One site suggested this means there is a trojan oin the MS Update process. But i have run virus and spyware scanners and found nothing. Hi, When ever I restart my labtop it move really slow. If someone can help me that could be great. Thank you, Bassel. So how do we fix the svchost. My comp whenever it gives me the error it makes it so windows explore doesn't work also the copy paste fuctions don't work anymore once i restart my comp it resets but the error always comes back no matter what it is im doing on the comp Can someone please post the solution to this svchost.
My problem was svchost. I do not know why, though. But I also have a firewall. It may have been that svchost was trying to download something, the firewall was blocking it, and it had to restart and take up cpu time.
Whatever the case, I followed 2 steps and my computer has been running like a champ. I'm actually using xp pro but I have the same problem too. The Run dialog box appears. Do not confuse the two. Click the Recovery tab. Using the drop-down lists, change First failure, Second failure, and Subsequent failures to "Restart the Service. Just select " Take no action ".
Then find out the svchost. That should clear up. Well,it has worked for me i don't know about others Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and click Search. We do ask that members not tag their questions on to a thread previously started by another member regardless of how similar your problem might seem.
Thank you, Colflagg. Now at least I understand what hit me as from May 6 when it all started. I am another victim of this. Within my business, I have a total of 6 PCs. The older PCs including a laptop that have been operating over a reasonable period of time are suffering with the exact same symptoms described. Seeing that said laptop had nothing of importance on it only used for accessing emails on the run , I decided to do a clean install of Windows XP Professional and immediately installed SP3 prior to reinstalling my CA Internet Suite software.
Has not yet been 24 hrs but with all definition updates installed and Auto Updates left ON, I have observed that the svchost. Will keep the PC running idle and have Process Explorer try keep a log of it. Not saying that everyone would like to take the same action as myself, but obviously fresher systems may not have the same issues.
Will watch this space. Cheers to colflagg for identifying the cause. However I did finally get my situation corrected on a laptop by eliminating the original SoftwareDistribution folder within the Windows directory. A new version of it got created, presumably by the windows update service, and ever since the system has been running fine, even with CA fully enabled and no files or directories excluded [which would be a serious exposure]. Each time I allowed wauaend. Now I do find that interesting.
So perhaps CA is somehow involved, but they are not alone in this mystery. I still have a nagging suspicion that Microsoft is at the heart of this situation. I disabled the CA On Access scan and it fixed the problem. I looked on CA's website but couldn't find anything about the issue. Keep me posted if you see CA fixes the issue and I'll do the same. So much for vulnerabilities.
I realised it was a Windiows Update issue late last night but was too tired to deal with it. This indicated seemingly indicated that the Update Service had completed - but there were no new updates!?!. Somehow the svchost. The other PCs have taken me all day to resolve and I wish I had found this thread earlier!
In the end the svchost. The problem hadnt shown up earlier because we so rarely reboot machines. Not the case with another group of PCs I look after. I have wasted 12 hours on this and hold MS and CA jointly responsible, till evidence shows to the contrary. I suspect its more CAs fault than MSs fault as in another famous update from CA they managed to label a whole raft of kosher sites as shipping out trojans.
That took about 4 hrs for them to correct. This has taken longer already. No Joe. However, there is no eta for the update. I just spoke to CA, its a recognised problem. They are aparently relasing an update on the 16th of may that will automatically fix the issue.
If you can't wait until then, do the following:. Reboot and use as per usual. When the CA update is released delete those exclusions. It seems CA is not willing to provide a date when this issue might be fixed.
The above document provides a hotfix and manual instructions. Here's the install path I used during my experience :. All units are up to date and no SVCHost issues. No fix yet here, however my solution is as follows:. This keeps the PC up to date with all Operating System patches. Performance is not affected. I have decided that I will manually switch to the Microsoft update system once every couple of weeks or so to catch the updates for Office etc.
I'll just have to set the updates scan running over a quiet period I suppose. Hope this sheds some light. Exclude installer files? Come on people! Identifying the cause of this problem was very important, as is finding a permanent, secure solution.
Anyone who experiences the problem would be far better off disabling the windows update service for a time rather than crippling their antivirus protection - there aren't daily updates from Microsoft anyway, so what do they think they would be missing?
Having said that, let me add that I am grossly disappointed with CA. My disappointment extends to their attitude regarding disclosure and accepting responsibility.
Once identified, this problem should have been more prominently addressed by CA, at least by way of public notification. Even after they started to provide a risky circumvention, they were mum on an expected target date for a more permanent solution. Savvy users hit the forums in search of answers, and eventually started to piece together the situation.
What about the not so savvy users - the millions of trusting CA customers potentially affected by this situation? Competition in this market is fierce and image is important. However, company integrity is more important. If customer loyalty is an important company goal then it is better kept with honesty than subterfuge. Savor Life, and Smile. I agree that CA has let down a lot of people in regards to this. I had oringally purchased the VET anti virus software about 10 years ago when the company that developed it wasn't under CA's control and have never had a problem with it until this event.
I was also disappointed by the speed at which I was shuffled off the online help call without them waiting until I had asked questions and tested what they had suggested, not that it was exactly the best solution. Nonetheless I turned everything back to normal today as it appears that CA has finally put a fix in place. Thanks I read the posts.. The last one says its fixed by updating the signatures.. Which does not work for me Is there anyone else who is facing the same problem even after updating their signatures?
If you are still having the problem, you may have a different one than what is described in this thread. Hi, Eric. This is an old thread, but I just had to do a clean install of Server R2 SP2 , and ran into this issue.
The various fixes in this thread and on other sites e. Had no effect. I don't get the sense that Microsoft has any real answer to this issue - clearly, people are still having issues, despite the fixes to MSI and WUA. I would love to not have to use old OS's, but out here in the real world, ISV's have to support our customers, and our customers use old OS's.
There's no practical value in copying over a "SoftwareDistribution" folder from one computer to another, since the WUAgent will rebuild it from scratch if it needs to which is exactly what it was trying to do when you misdiagnosed the CPU utilization in this particular scenario.
The error code is The Srvinfo. This tool is included in the Windows Server Resource Kit. When you manually try to start the Server service by using the Computer Management snap-in or by typing net start server at the command prompt, you may receive the following error message:. Could not start the Server service on Local Computer. Error 5: Access is denied.
This behavior occurs even though the user account is a member of the local Administrators group and the Server service is configured to start by using local system credentials. This problem may occur if the computer experiences a low-memory condition. When the computer experiences a low-memory condition, memory corruption may occur in the private heap of a dynamic link library.
These random heap corruptions may cause programs to crash. Memory corruption may occur when you run memory-intensive programs on a computer that has the Intel Physical Addressing Extensions PAE specification enabled. PAE enables a computer to support more than 4 gigabytes GB of installed memory.
The Server service runs on a Windows Server based computer together with some other services in a Svchost.
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