Kind of weird what is happening really!

My computer and internet seem to be working fine, then for the last few days, the internet will just stop working. It won't slow down, nothing strange happens on the screen that I can see, but all of the sudden my internet drops.

The weird thing is that the only thing that fixes it is rebooting the computer. I've tried hard rebooting and powercycling the modem, but that doesn't do it. Which is why I think there's something screwy going on with the computer? So I decided to come get the experts help again! Only real changes I've made in the last few days are installing SP 3 and windows messenger and any required updates from Microsoft.

Oh! Also, sometimes when I would pull the power to my modem just to boost my speed, I would get what reminded me of the sasser or blaster virus - that my computer was shutting down in 60 seconds. Any idea why it would do that just from having a cable disconnected?

Thanks as always! <hugs>

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 9:59:29 AM, on 9/9/2008
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\PROGRA~2\SYMANT~1\SYMANT~1\vptray.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\Program Files\Amazon\Amazon Unbox Video\ADVWindowsClientService.exe
C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\PROGRA~2\SYMANT~1\SYMANT~1\DefWatch.exe
C:\Program Files\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
C:\PROGRA~2\SYMANT~1\SYMANT~1\Rtvscan.exe
C:\Program Files\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
C:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcIp.exe
C:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcLog.exe
C:\WINDOWS\System32\nvsvc32.exe
C:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcAppFlt.exe
C:\Documents and Settings\Me\Desktop\imabunny.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.netflix.com/
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_02\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: [vptray] C:\PROGRA~2\SYMANT~1\SYMANT~1\vptray.exe
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~2\MICROS~1\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_02\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~2\MICROS~1\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O23 - Service: Amazon Unbox Video Service (ADVService) - Amazon.com - C:\Program Files\Amazon\Amazon Unbox Video\ADVWindowsClientService.exe
O23 - Service: AVG Anti-Spyware Guard - GRISOFT s.r.o. - C:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: ##Id_String1.6844F930_1628_4223_B5CC_5BB94B879762## (Bonjour Service) - Apple Computer, Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: DefWatch - Symantec Corporation - C:\PROGRA~2\SYMANT~1\SYMANT~1\DefWatch.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Program Files\Common Files\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: ForceWare Intelligent Application Manager (IAM) - Unknown owner - C:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcAppFlt.exe
O23 - Service: Forceware Web Interface (ForcewareWebInterface) - Apache Software Foundation - C:\Program Files\NVIDIA Corporation\NetworkAccessManager\Apache Group\Apache2\bin\apache.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: NBService - Nero AG - C:\Program Files\Nero\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Program Files\Common Files\Ahead\Lib\NMIndexingService.exe
O23 - Service: Symantec AntiVirus Client (Norton AntiVirus Server) - Symantec Corporation - C:\PROGRA~2\SYMANT~1\SYMANT~1\Rtvscan.exe
O23 - Service: ForceWare IP service (nSvcIp) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcIp.exe
O23 - Service: ForceWare user log service (nSvcLog) - NVIDIA - C:\Program Files\NVIDIA Corporation\NetworkAccessManager\bin\nSvcLog.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe

--
End of file - 5164 bytes

Hello, Sarah... I gotta suggest something good to get hold of those hugs... I'm not thinking it is malware [your log is clean...] but more firewall or modem settings related. AVG AS is hot onto Sasser/Blaster worms.
All this happened AFTER loading SP3? You might try uninstalling your Nvidia Network Access Manager [it is the UI for network settings and the NV firewall] in CP, Add/Rmv Pgms.
Of course, you may be one of the unlucky few who contracted problems with SP3...