Please HELP! Computer restarts with Yahoo open. No viruses, No spyware

All recovery tab options are set to “take no action” — i know i cant quite explain what is happening, but the computer is NOT restarting, it is not shutting down, it is not going through anything like that. It is an instant off right then and there. No thinking about it, no slowing down, no shut-down proceedure started. It is instantly at the blank Bios starting screen, as if you had a split second power outage. And it really is as if the power stops because it starts over suddenly from the memory scan. If you restart your computer, it pops up the ram memory count, it doesnt scan through it again like a fresh power on. This DOES rescan the memory too, just like a power off-power on. And– it sounds terrible, almost like a star wars gun sound, very very faint mind you, but a very electric type sound in the power box/motherboard area like when you do power off, that weird sound an old crt monitor makes. Its not a physical problem either as i’ve just recently replaced my power supply with a top-o-the line one, and never had problems before or with anything other than the yahoo one.

Hope any of this extra info can help someone figure out a solution for me!!

Logfile of HijackThis v1.99.1
Scan saved at 2:37:12 PM, on 2/25/2007
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

Running processes:
C:WINDOWSSystem32smss.exe
C:WINDOWSsystem32winlogon.exe
C:WINDOWSsystem32services.exe
C:WINDOWSsystem32lsass.exe
C:WINDOWSsystem32svchost.exe
C:WINDOWSSystem32svchost.exe
C:WINDOWSsystem32LEXBCES.EXE
C:WINDOWSsystem32spoolsv.exe
C:WINDOWSsystem32LEXPPS.EXE
C:WINDOWSsystem32hidserv.exe
C:WINDOWSSystem32inetsrvinetinfo.exe
C:WINDOWSsystem32mgabg.exe
C:WINDOWSsystem32regsvc.exe
C:WINDOWSsystem32MSTask.exe
C:WINDOWSsystem32stisvc.exe
C:WINDOWSSystem32WBEMWinMgmt.exe
C:WINDOWSsystem32svchost.exe
C:WINDOWSSystem32svchost.exe
C:WINDOWSExplorer.EXE
C:Program FilesGoogleGoogle Desktop SearchGoogleDesktop.exe
C:WINDOWSsystem32PDeskPDesk.exe
C:WINDOWSsystem32ctfmon.exe
C:Program FilesGoogleGoogleToolbarNotifier1.2.1128.5462GoogleToolbarNotifier.exe
C:Program FilesGoogleGoogle Desktop SearchGoogleDesktopIndex.exe
C:Program FilesGoogleGoogle Desktop SearchGoogleDesktopCrawl.exe
C:Program FilesWUSB11 WLAN MonitorWLAN_cfg.EXE
C:Program FilesToshibaBluetooth Toshiba StackTosBtMng.exe
C:Program FilesToshibaBluetooth Toshiba StackTosA2dp.exe
C:Program FilesToshibaBluetooth Toshiba StackTosBtHsp.exe
C:Program FilesToshibaBluetooth Toshiba StacktosOBEX.exe
C:Program FilesToshibaBluetooth Toshiba StacktosBtProc.exe
C:Program FilesToshibaBluetooth Toshiba StackECCenter.exe
C:Program FilesYahoo!MessengerYahooMessenger.exe
C:HijackThis.exe

R0 – HKLMSoftwareMicrosoftInternet ExplorerMain,Local Page =
R1 – HKCUSoftwareMicrosoftInternet ExplorerMain,Window Title = Gallivant
O2 – BHO: Mouse Gestures – {A6A49249-57AE-4295-8D4D-18A9502C7D8E} – C:Program FilesInternet ExplorerPluginsDrowseMouseGestures.dll
O2 – BHO: Google Toolbar Helper – {AA58ED58-01DD-4d91-8333-CF10577473F7} – c:program filesgooglegoogletoolbar5.dll
O2 – BHO: &Google Notebook – {CCCCCCD3-666F-4F81-8B69-745DE9F6D897} – C:Program FilesGoogleGoogle Notebookgnotes1.0.2.17-126330072.dll
O3 – Toolbar: Google Notebook – {CCCCCCDB-4DDB-4703-95D4-DD2C526397BF} – C:Program FilesGoogleGoogle Notebookgnotes1.0.2.17-126330072.dll
O3 – Toolbar: &Google – {2318C2B1-4965-11d4-9B18-009027A5CD4F} – c:program filesgooglegoogletoolbar5.dll
O4 – HKLM..Run: [Google Desktop Search] “C:Program FilesGoogleGoogle Desktop SearchGoogleDesktop.exe” /startup
O4 – HKLM..Run: [Matrox Powerdesk] C:WINDOWSsystem32PDeskPDesk.exe /Autolaunch
O6 – HKCUSoftwarePoliciesMicrosoftInternet ExplorerControl Panel present
O8 – Extra context menu item: Note this (Google Notebook) – res://C:Program FilesGoogleGoogle Notebookgnotes1.0.2.17-126330072.dll/gn_menu1.html
O8 – Extra context menu item: Note this item (Google Notebook) – res://C:Program FilesGoogleGoogle Notebookgnotes1.0.2.17-126330072.dll/gn_menu2.html
O9 – Extra button: (no name) – {4E660F19-E91E-41e1-88EF-D1DFAB118F67} – C:Program FilesInternet ExplorerPluginsDrowseMouseGestures.dll
O9 – Extra ‘Tools’ menuitem: Mouse Gestures… – {4E660F19-E91E-41e1-88EF-D1DFAB118F67} – C:Program FilesInternet ExplorerPluginsDrowseMouseGestures.dll
O16 – DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) – http://go.microsoft.com/fwlink/?linkid=39204
O16 – DPF: {F6BF0D00-0B2A-4A75-BF7B-F385591623AF} (Solitaire Showdown Class) – http://messenger.zone.msn.com/binary/SolitaireShowdown.cab
O20 – AppInit_DLLs: C:PROGRA~1GoogleGOOGLE~1GOEC62~1.DLL
O23 – Service: Adobe LM Service – Adobe Systems – C:Program FilesCommon FilesAdobe Systems SharedServiceAdobelmsvc.exe
O23 – Service: Ati HotKey Poller – Unknown owner – C:WINDOWSsystem32Ati2evxx.exe
O23 – Service: Logical Disk Manager Administrative Service (dmadmin) – VERITAS Software Corp. – C:WINDOWSSystem32dmadmin.exe
O23 – Service: GoogleDesktopManager – Google – C:Program FilesGoogleGoogle Desktop SearchGoogleDesktopManager.exe
O23 – Service: Google Updater Service (gusvc) – Google – C:Program FilesGoogleCommonGoogle UpdaterGoogleUpdaterService.exe
O23 – Service: InstallDriver Table Manager (IDriverT) – Macrovision Corporation – C:Program FilesCommon FilesInstallShieldDriver11Intel 32IDriverT.exe
O23 – Service: LexBce Server (LexBceS) – Lexmark International, Inc. – C:WINDOWSsystem32LEXBCES.EXE
O23 – Service: MGABGEXE – Matrox Graphics Inc. – C:WINDOWSsystem32mgabg.exe
O23 – Service: Intel NCS NetService (NetSvc) – Intel(R) Corporation – c:Program FilesIntelNCSSyncNetSvc.exe

but actually it restarted quickly this time, once before i logged in, then again like 10 minutes after i started it. I have it running now, and its been at least 10-20 minutes without problem, but i dont know if its same or worse with this newest version. (i think its same version I had though)

Also, dont know if this is actually happening or not, but, it SEEMS like if i do nothing, or am away from my computer, it will restart quickly. Where as if i am surfing the net, typing something, or even playing solitaire, it will take a good 45 min to an hour or longer to restart. Like, i have once left a mpg video file playing and it will play through at least a couple times before it decides to restart where if it is still, nothing happening, although like word or IE or something can be open and doesnt matter, it will restart somewhere between like 5 minutes and an hour. No written time record to know if this is fact or just seems like its the case. And i dont mean it will be locked up or restarting for that long, i just mean it works fine before it suddenly, for no reason, restarts.

So far, i’ve spent about 10-15 minutes typing this though, took a phone call in the middle, and its still here, not restarted yet. But it has twice already since i reinstalled yahoo.

thanks

well thats just it, it doesn’t happen with other programs. If yahoo is not started, it never happens. never. I don’t even get random shut-downs, i try to keep my system pretty clean. I am 100% positive its some conflict caused by yahoo messenger.