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  1. #1
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    WinXP Pro - SVCHOST taking 99% cpu

    Just installed WinXP Pro over W2K. WinXP is running at 100% cpu, and some things are failing saying I don't have enough memory. I'm on 1.1gz AMD, 640meg. Found an entry in MS Knowedge base saying there was problem with USB Scanners (which I have) polling. I put on the suggested change (I increased the polling timeout to 100,000 (the default is 700ms) but no change. There was a spelling error in the Article, so I'm not sure if the registry key they gave me is 100% correct. I showed up with 3 entries (as I was warned about) for my scanner, as USB devices tend to move around if you unplug em and replug em in a different place. I looked at the Registry for SVCHOST and I have 4 entries, all unfamiliar to me. Is there anyway of finding out who SVCHOST is doing the work on behalf of? I also have a WebCam plugged into a USB port as well as a cord for my Digital Camera, if USB polling could be the problem. Still early in the WinXP Pro arena, I suspect there will be more entries in Knowledge base, so not too surprised I don't see my problem there yet. Any help would be appreciated. Thx... Michael

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    Re: WinXP Pro - SVCHOST taking 99% cpu

    This is interesting. I just did a re-install but did a 'new' installation. Means I have to re-install all my apps - yecch. However, install
    went ok, got my Anti-virus and Firewall on, then MS Office, then a couple of 'new' shortcuts to my desktop. Had a few reboots. Everything was flying. Then the cpu overhead problem started again! I know I was working on Netscape just prior to it starting, but not sure if that caused it as uninstalling Netscape and re-installing didn't fix it. One of the things I created was a link to c:windowssystem32cmd.exe to have a DOS box. Found a reference to WOWEXEC.EXE that said it could cause problems (it's the driver behind 16 bit apps). And it is definitely in the TASK Manager driven by NETVDM. However, nothing I do (like forcing the proceses) seems to stop this. SVCHOST is the top, but System Idle is in there now, as well as a few tasks like Atrack.exe, with
    WOWEXEC.EXE's. Forcing them doesn't seem to make any difference. So I'm almost down to a bare bones system - none of my old goodies running. It should be obvious what is killing me, but I can't see it. I also did a Windows Update to pick up one critical fix from MS as well as 7 other ones. No change!. Is there some monitor or something I can use to trace this? SANDRA (at least the things I selected) doesn't seem to tell me much. . ...Michael

  3. #3
    ileacy
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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Mike:

    Have you installed any of your USB devices???

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    Re: WinXP Pro - SVCHOST taking 99% cpu

    NO! You think that might be it? I've stayed away from modifying anything so far. Ok, I'll pull the plug on em, stick em back in and re-install. Thanks Ian. I'll get back to you. (Over in the Microsoft forum I saw a reference to turning off Plug & Play - I don't like that one, but I may try it later.) USB's 1st. thanks... Michael

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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Nope didn't do it. Ripped out the HP Digital Camera one as HP hasn't got their drivers yet. The other two I installed and they're working. Thought I almost had it when I went to Administration ToolsServices and changed Plug and Play to manual. Everything started flying and SVCHOST was down to 5%. Reboot put things back to 'normal' and my system slowed to a crawl again. Tried changing it to 'Disable' but that didn't work and of course I lost all my devices - sound card, etc. Put it back. Anyway, I'm still hung out with SVCHOST taking 99% and my system running flat out at 100%. Keep getting messages saying my virtual page size will be increased as apps run out of memory. Yecch. ... Michael

  6. #6
    ileacy
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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Michael:

    Maybe time to go back to basics.

    SVCHOST (services host) is a generic host process name for services that are run from DLLs. Seeing SVCHOST taking loads of CPU means that some service is taking over the CPU.

    You can see which services are hosted by running System Information, expand the services tree, and sort the results by Path. Note which services are "Running" via svchost.

    Start and minimize task manager. You can use the icon in the system tray to monitor cpu usage.

    Now start the "Computer Management" tools and select Services & Applications | Services. Try stopping individual HOSTED services, checking CPU usage, and then restarting the service. This should isolate which service is causing the problem.

    I have this feeling that your problem is device related, but, can't prove it. I don't think you have a serious hardware problem as W2K ran smoothly on the same system prior to upgrade.

    The only other thing I can suggest is to go with a *really* clean install, ie. reformat C: first.

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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Thanks Ian. Will give it a shot. In the meantime a question. I was thinking of formatting my 'c' drive, but since I have the WinXP Pro Upgrade, how will it know I qualify? I didn't see any option when I did the 'new install' to format the 'C' drive. thx... Michael

  8. #8
    ileacy
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    Re: WinXP Pro - SVCHOST taking 99% cpu

    It will ask you for qualifying media. Just insert your CD for the prior OS when asked and you can continue.

    PS: I made an edit to my prior post re. service testing procedure. Hope you caught it.

  9. #9
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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Hi Ian. I went into Services and started shutting down apps. Nothing seemed to stop the cpu grabber - I have 37 apps 'running' under SVCHOST. I've had up to 84 in this thread (not all of them running though). So it took some time. I got a bit more frustrated and decided to format my 'C' drive. So I booted off the XP CD, told it to do a 'fat' format which of course did a FAT32 due to the size, and away I went. Started slowly adding more stuff back in. Got a lot of stuff in and was delaying putting on Netscape! Yep, as soon as I did the problem came back and I've still got it. Uninstalling Netscape (and the REALTIME program didn't get rid of the problem.) Since then I've done a 'clean' boot, disabled everything and got back up to 'services' (System.ini, WIn.ini were ok) and the problem came back (using MSCONFIG). Then one by one I disabled each of the Services. I couln't get rid of the problem. So then I took all my USB devices out and in fact deleted all the USB drivers. Of course it found the HUB and put them back, but I don't think USB devices are the problem. Now, the one thing that's bugging me as I CAN't get on to my home network. (I'm hooked to a hub - cable is hooked to the hub and my other 2 machines are hooked to the hub. When I try and get to my 'workgroup' it says 'xxxxx' is not accessible (I put in xxxxx instead of my real workgroup name). Then it says I might not have permission. So I'm starting to learn about 'permissions' and have loaded 'MMC' to see if I can get help there. My thinking is that maybe someone's polling my network and causing the 'looping' and thus the cpu overhead. Anyway, even though it's slower than a 286, I'm one by one putting my apps back. Yecch. I sure would like to find out who this guy is that's slowing me down. By the way I updated all my software using Windows Update. (1 critical, 8 others, and 1 hardware - my SoundBaster Live card). By the way I didn't update any of my drivers at the beginning and until I put on Netscape I was ok. Since I'm now up to my neck in goop, I decided to bring everything up to date. Logitech keyboard, Logitech Mouse, ATI Radeon video, Soundblaster, Epson Printer, AGFA scanner - all of these had XP versions of their drivers. Still prowling around the MS Knowlege base and other places looking for a solution. ... Michael

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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Hi
    If you suspect you're being polled, install a firewall and read its log after a few hours.

    Rgds

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    Re: WinXP Pro - SVCHOST taking 99% cpu

    I have Norton Internet Security so I'll check. Thx ... Michael

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    Re: WinXP Pro - SVCHOST taking 99% cpu

    This is fun. Couldn't get at the Norton Firewall's logs (at least via the 'reporting' in the product). Went to 'Options' and got msg... "Access denied. Only the supervisor can view/change the options". Found an entry in Symantec about a known problem and to fix I was to go to 'options' and disable the automatic start. Needless to say that's how I got theoriginal error message so of course I couln't change it. Went in and renamed IAMAPP.EXE and rebooted but still couldn't do anything about looking at the reports. At work now, but later I'll re-install the firewall and for that matter all my Norton stuff -System Works which includes Anti-virus, etc. Will 1st of course see if leaving them 'uninstalled' will cause my problem to go away. Don't think so, as I had them all on for quite a while with no problems after I formated my 'C' drive and re-installed (see previous append). ...Michael

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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Ok, I think I'm done. Just formated my 'C' drive again and re-installed. With the few apps I've got at this point it only takes about 40 minutes then the apps. Not bad.
    I have a program from Aventail called Connect, that has hooks into TCP/IP so I can bridge to my company's Intranet. This was the culprit. It was so subtle, it didn't show up anywhere. However I do need to get to the Intranet, so I'm going to need a fix. But at least I'm up, and hopefully for good now! Thanks for all your help. By the way, I installed NETBEUI and got my home network back. So far so good. I learned (and am learning) a lot. I've always said that if I've no problems with a new system, then I haven't learned anything. Well, I get what I ask for <img src=/S/smile.gif border=0 alt=smile width=15 height=15> Thanks again. ...Michael

  14. #14
    ileacy
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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Great:

    Now you just have to wait for Aventail to release a certified Connect Client for XP. Given their enterprise centric business, that should be a short wait.

  15. #15
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    Re: WinXP Pro - SVCHOST taking 99% cpu

    Did some digging through my company. Apparently there's a way to tell Aventail Connect to ignore SVCHOST. Going to try that now. Helps most people. Then there's also a beta version, 4.12 of Aventail Connect that sort of works too (some people having some problems though). If anyone needs more info, drop me a line here and I'll post what I found. (and again, thanks very much for your help Ian. It's very very much appreciated.) ...Michael

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