windows Vista 100% Cpu load problem

hey guys. i hope anyone one can help me on this one.

i don't know why but my cpu is reaching 100% load while im not doing nothing... im using vista ultimate edition and i use a gadget to monitor the cpu usage, and it fills out 100% on every core. im using a Intel Q6600 @ 2.4GHz.
but when i open the task manager, the cpu usage drops down to normal again... but when i close the Task manager, it goes up to 100%.

i don't know why it does this, is it because of a windows update? cuz yesterday i wanst having this problem. i was planning on instaling CRYSIS, and the windows recommended an update (before i could play the game i must download the update) so i did, i left the computer doing the update.. and today when i instal CRYSIS, i see that i have a problem with the CPU usage...

can anyone help me plz? i just don't know what to do :(..

tks in advance:)

i don't know if it help but here you have the applications that are instaled on my pc:

-Adobe Flash Player ActiveX
-Adobe Flash Player Plugin
-Ava Find
-Intel(R) Graphics Media Accelerator Driver
-Intle(R) PRO Network Connections
-Internet Download Manager
-Java(TM)6 Update 2
-Java(TM)6 Update 3
-Kaspersky Anti-Virus 6.0
-LimeWire PRO 4.15.0
-Messenger Plus! Live
-Microsoft Office Professional Plus 2007
-Microsoft Visual C + + 2005 redistributable
-Mozilla Firefox (
-NVIDIA Drivers
-Pro Evolution Soccer 2008
-Punkbuster Services
-Realtek High Definition Audio Driver
-Spybot - Search & Destroy 1.4
-Virtua Tennis 3
-Vista Codec Package
-Windows Live Installer
-Windows Live Messenger
-Windows Live Sign-in Assistant
-WinRAR archiver
28 answers Last reply
More about windows vista load problem
  1. Did you format the drive when you installed vista? I didnt the first time either and I had the same problem.
    I ended up re-installing vista (did a complete format this time) and the problem went away.
  2. this is not the first time that this has happened to me... its the second time.. the first time i formated the system partition and instaled windows again.
    my dad had the same problem. and he did something to make it go away but he doesnt remember.. do you have any other suggestions besides formatting?

    tks :)
  3. 1. Press ctrl+alt+del to run task manager, there you can see what app in particular is running the CPU at 100%

    2. If you can't get to the bottom of it that way then un-install the update. Do this from control panel, programs, view installed updates
  4. tks .. :) ill try that:).. i really appreciate it =)
  5. nope.. i tryed ctrl+alt+del but when i do that ... the cpu load goes down so i can't see if it's a program that's consuming it...

    and i un-installed the last update before this problem and it still persists =(..

    anymore suggestions?
  6. Try shutting down any suspect programs, such as that AVA search for example. Maybe it's stuck in some sort of indexing loop. Shut down all running programs one by one until you hit the right one.

    I'd also scan for spyware. Try another free one such as adaware if spybot doesn't see anyhthing.
    Also try shutting down Kaspesrsky.

    If all else fails try a system restore.
  7. i tried to shut down the programs and the problems still persists... im donwloading ADAWARE now... what do you think the problem may be?
  8. Not sure. Hard to say until you narrow it down. Something is running. Either a program or some windows process. Could be virus or spyware or it could be something simply malfunctioning, either hardware or software.
    Try booting into safe mode (press f8 after startup, just before windows starts to load) and see if it is happening there.
  9. Another idea: start task manager, highlight 'explorer.exe' and then 'end process'. Now, still in task manager, go to file 'new task (run) and type 'explorer' and hit enter. See if you still have problem.

    Does the PC seem slow and unresponsive during these 100% episodes? Is it happening all the time and after every boot?
  10. Do you still have the windows old folder? If you do, then that means you didnt format. It caused me problems even when I deleted the folder. There was some kind of conflict, even loading a webpage was 100% cpu usage and dog slow. I couldnt deal with it anymore. I formatted and the problem is now gone.
  11. I had a similar problem which seemed to be a running battle between UAC(User account control) and Zone Alarm. Could try disabling UAC and see if that makes a difference.
    Also check your power managment options as my Q6600 was being throttled right back, and seemed to be using an excessive amount of processing power.
  12. instead of alt ctrl del, try ctrl + shift + esc, this goes striate to the task manager instantly so might catch that rogue usage
  13. I'm thinking whatever program you are using to monitor CPU usage may not be working properly... So another thing to do is try a different program to monitor CPU usage.
  14. Scotteq said:
    I'm thinking whatever program you are using to monitor CPU usage may not be working properly... So another thing to do is try a different program to monitor CPU usage.

    Great point. I should have told him to look into this at the outset. I think he's gone now though.
  15. hey guys... im sorry for the delay i was on vacation without any internet available... im gunna try out everything you said
    ill keep you posted

    thanks =)=)
  16. my UAC is disabled and i downloaded a probram to see the cpu usage and it still tells me that im using 100%.
    when im on safe mode the cpu usage is normal.
    the strange thing is that when i use the task manager, the cpu usage goes down to normal.

    the pc seams a bit slower with the 100% usage...

    i have no ideas now =(
  17. the program i used to see the pc usage is called ''cpu usage viewer'' its a freeware.

    what are your suggestions on programs for catching spyware or viruses... i always thought that KASPERSKY could chatch any virus =S... hmmm...
  18. dobby said:
    instead of alt ctrl del, try ctrl + shift + esc, this goes striate to the task manager instantly so might catch that rogue usage

    Have you tried the above suggestion?

    Try turning off the sidebar.

    Try turning off aero.

    Kaspesky is very good but in these cases it's always best to try several anti-malware programs. Try the free online versions. Adaware and spybot and AVG all have free versions.

    You also might try running 'hijack this' and then post your log.

    I'd also update all my device drivers if that has been awhile. Particularly your video and audio drivers.

    Also, in task manager turn off ALL running processes and programs which will allow you to turn them off. Try to get your system running with almost nothing running in the background. You can't hurt anything turning them off. Even your anti-virus, just unplug from the internet/network when you do.
  19. how can i catch the rogue usage? i didn't understand this part =S,
    and whats ''aero''?
    and can you help me by telling me how can i safelly update all my drivers? i think that there is a program which i can see if the driver is up do date right?

    thanks for you support, hope to hear from you soon =)
  20. hey.. i just found out something. i tryed that ctrl+shift+esc and it worked =)=)=)

    its a system program called ''dnetc.exe'', heres the image:

    now... how can i get rid of this thing?

  21. you can go to the link to see the image better: Free Image Hosting

    heres the HIJACKTHIS log:

    Logfile of HijackThis v1.99.1
    Scan saved at 20:21:40, on 06/01/2008
    Platform: Unknown Windows (WinNT 6.00.1904)
    MSIE: Internet Explorer v7.00 (7.00.6000.16575)

    Running processes:
    C:\Program Files\Windows Defender\MSASCui.exe
    C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\avp.exe
    C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe
    C:\Program Files\Windows Sidebar\sidebar.exe
    C:\Program Files\Internet Download Manager\IDMan.exe
    C:\Program Files\Windows Live\Messenger\msnmsgr.exe
    C:\Program Files\DAEMON Tools\daemon.exe
    C:\Program Files\AvaFind\AvaFind.exe
    C:\Program Files\Windows Sidebar\sidebar.exe
    C:\Program Files\Internet Download Manager\IEMonitor.exe
    C:\Program Files\Mozilla Firefox\firefox.exe
    C:\Program Files\HijackThis\HijackThis.exe

    R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page =
    R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
    R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL =
    R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL =
    R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page =
    R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
    R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
    R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
    R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
    O1 - Hosts: ::1 localhost
    O2 - BHO: IDM Helper - {0055C089-8582-441B-A0BF-17B458C2A3A8} - C:\Program Files\Internet Download Manager\IDMIECC.dll
    O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
    O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
    O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
    O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
    O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
    O4 - HKLM\..\Run: [AVP] "C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\avp.exe"
    O4 - HKLM\..\Run: [RtHDVCpl] RtHDVCpl.exe
    O4 - HKLM\..\Run: [snpstd] C:\Windows\vsnpstd.exe
    O4 - HKLM\..\Run: [IgfxTray] C:\Windows\system32\igfxtray.exe
    O4 - HKLM\..\Run: [HotKeysCmds] C:\Windows\system32\hkcmd.exe
    O4 - HKLM\..\Run: [Persistence] C:\Windows\system32\igfxpers.exe
    O4 - HKLM\..\Run: [NvSvc] RUNDLL32.EXE C:\Windows\system32\nvsvc.dll,nvsvcStart
    O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
    O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\Windows\system32\NvMcTray.dll,NvTaskbarInit
    O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_03\bin\jusched.exe"
    O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
    O4 - HKCU\..\Run: [IDMan] C:\Program Files\Internet Download Manager\IDMan.exe /onboot
    O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
    O4 - HKCU\..\Run: [DAEMON Tools] "C:\Program Files\DAEMON Tools\daemon.exe" -lang 1033
    O4 - HKCU\..\Run: [AvaFind] "C:\Program Files\AvaFind\AvaFind.exe" /minimized
    O8 - Extra context menu item: Download All Links with IDM - C:\Program Files\Internet Download Manager\IEGetAll.htm
    O8 - Extra context menu item: Download with IDM - C:\Program Files\Internet Download Manager\IEExt.htm
    O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
    O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
    O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_03\bin\ssv.dll
    O9 - Extra button: Web Anti-Virus statistics - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\scieplugin.dll
    O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
    O10 - Unknown file in Winsock LSP: c:\windows\system32\nlaapi.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\napinsp.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O10 - Unknown file in Winsock LSP: c:\windows\system32\idmmbc.dll
    O11 - Options group: [INTERNATIONAL] International*
    O13 - Gopher Prefix:
    O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) -
    O17 - HKLM\System\CCS\Services\Tcpip\..\{BB92759E-15DB-4926-8FE1-7307FA3F8347}: NameServer =,
    O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WI1F86~1\MESSEN~1\MSGRAP~1.DLL
    O18 - Protocol: ms-help - {314111C7-A502-11D2-BBCA-00C04F8EC294} - C:\Program Files\Common Files\Microsoft Shared\Help\hxds.dll
    O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\WI1F86~1\MESSEN~1\MSGRAP~1.DLL
    O18 - Filter hijack: text/xml - {807563E5-5146-11D5-A672-00B0D022E945} - C:\PROGRA~1\COMMON~1\MICROS~1\OFFICE12\MSOXMLMF.DLL
    O20 - AppInit_DLLs: C:\PROGRA~1\KASPER~1\KASPER~1.0\r3hook.dll
    O20 - Winlogon Notify: igfxcui - C:\Windows\SYSTEM32\igfxdev.dll
    O20 - Winlogon Notify: klogon - C:\Windows\system32\klogon.dll
    O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft AB - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
    O23 - Service: Kaspersky Anti-Virus 6.0 (AVP) - Unknown owner - C:\Program Files\Kaspersky Lab\Kaspersky Anti-Virus 6.0\avp.exe" -r (file missing)
    O23 - Service: client (dnetc) - Distributed Computing Technologies, Inc. - C:\Windows\dnetc.exe
    O23 - Service: @%SystemRoot%\ehome\ehstart.dll,-101 (ehstart) - Unknown owner - %windir%\system32\svchost.exe (file missing)
    O23 - Service: PnkBstrA - Unknown owner - C:\Windows\system32\PnkBstrA.exe
    O23 - Service: @%SystemRoot%\system32\qwave.dll,-1 (QWAVE) - Unknown owner - %windir%\system32\svchost.exe (file missing)
    O23 - Service: @%SystemRoot%\system32\seclogon.dll,-7001 (seclogon) - Unknown owner - %windir%\system32\svchost.exe (file missing)
    O23 - Service: @%ProgramFiles%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - %ProgramFiles%\Windows Media Player\wmpnetwk.exe (file missing)
  22. So it is clear dnetc.exe is the problem. I also see it in the hijack log as : O23 - Service: client (dnetc) - Distributed Computing Technologies, Inc. - C:\Windows\dnetc.exe

    I am not familiar with it myself but a quick Google seems to indicate it can be part of windows update, part of legitimate distributed computing projects like folding at home, AND part of illegitimate distributed computing viruses and worms!

    On my Vista ultimate 64 I have no dnetc.exe anywhere on my c drive! Hmmm..

    Have you installed any distributed computing projects like folding or seti? Assuming you have not:

    1. Try turning it off from within the window that pops up when you ctrl+shift+sec. Just highlight it and select 'end process'. Does it then stop? Does it stop and them come back on? Or what?

    2. Click the windows button/orb in lower left desktop and in the box type: "msconfig" and then hit enter.

    3. Click the 'startup' tab and see if dnetc is in the list of programs set to start up automatically. If it is then deselect it and reboot and see if you still have problem

    4. If dnetc is NOT in your startup list then something else is starting up and then running dnetc.exe. So list all of the things in this startup list and perhaps we can figure out which one is the bad guy.

    5. If none of this helps you may have a deeper sort of virus and we can cross that bridge if we get to it.
  23. well.. i when i ended the process it never came back again..
    but when i restart it comes back again... i deleted the program and all seems fine now:D:D:D

    tks for all of your support:D:D:D i really appreciate it =)

  24. cheers!
  25. If CPU is high or 100% in vista for no apparent reason then do the following:
    1. Close all explorer windows
    2. Remove USB devices one by one whilst monitoring CPU until it drops to normal levels.

    Plugging in a USB device such as memory stick causes v high CP as explorer tried to scan it for thumbanils etc. I hate this behaviour.

    Also, If your machine is disk and momory constrained you can see your disk and CPU activity shoot up just after startup on Vista. This is due to VSS taking a snapshot of your hard disk(s). This also can consume a great deal of hard disk space. Either leave it to complete and come back later or right click on My Computer, go to Properties, click System Properties then the System Proptection tab and uncheck all drives listed. Then click OK. This will free up space on your hard disk and stop high disk usage.

    Disabling this will also disable built in windows backups of your hard disk so don't do this if you don't have any other backup or if you're in the middle of installing software or hotfixes.

    When your machine has settled down, don't forget to go back into System Protection and reenable the system restore on your disks otherwise you will forget about it until the next time windows get corrupted and you won't be able to restore to a last known good configuration.
    After re-enabling system protection, you should expect any incremental disk based backups such as Mozy to detect this as changed data and reupload the entire full backup on next run but it will only do this once.

    Also re VSS - be careful if using an old version of diskeeper. Use the latest one as it understands what not to do with your hard disk is VSS is enabled.

    Finally, run CCleaner regularly followed by a virus check to keep your hard disks clean and windows running quickly.

    In general, take care of your hard disk.

    "Take care of your brush..."
    - Trgger, Only Fools and Horses
  26. Bringing DEAD threads back to life eh?
  27. :pt1cable: :pt1cable: hello there i am new at this
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