HELP!!!Hearing Random Sounds in Background+ Windows abruptly closing!

I reformatted my PC yesterday and correctly re-install all drivers/SPs/back ups. When i watch videos I hear random sounds from the background. There were no ads/programs i was running. I'm not a malware analyst but I know there is a problem. Here is my hijackthis log:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 10:01:02 PM, on 6/16/2010
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
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:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\System32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\taskmgr.exe
C:\Program Files\AIM\aim.exe
C:\Program Files\Avira\AntiVir Desktop\avguard.exe
C:\Program Files\Avira\AntiVir Desktop\avshadow.exe
C:\Program Files\Avira\AntiVir Desktop\sched.exe
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\Program Files\Xfire\xfire.exe
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
C:\Program Files\Windows Live\Contacts\wlcomm.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Avira\AntiVir Desktop\avcenter.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Program Files\Avira\AntiVir Desktop\avscan.exe
C:\WINDOWS\System32\vssvc.exe
C:\WINDOWS\System32\dllhost.exe
C:\WINDOWS\System32\dllhost.exe
C:\Documents and Settings\Xuan\My Documents\Downloads\HiJackThis.exe

O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (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: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\System32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\System32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background
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
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1276671529171
O23 - Service: Avira AntiVir Scheduler (AntiVirSchedulerService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: nProtect GameGuard Service (npggsvc) - Unknown owner - C:\WINDOWS\system32\GameMon.des.exe (file missing)
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\System32\nvsvc32.exe
O23 - Service: Viewpoint Manager Service - Viewpoint Corporation - C:\Program Files\Viewpoint\Common\ViewpointService.exe

--
End of file - 3051 bytes

I forgot to mention that whenever I click on something(i.e. AIM/Firefox) it would take quite a while, maybe 1-2 minutes, for it to load. Perhaps it is the Avira that is slowing that down or something else?

Hi, please tell me what configuration do you have ?

Nazzgull wrote:

Hi, please tell me what configuration do you have ?

window xp home edition SP2

intel(R) Pentium(R) 4 CPU 2.40GHz 2.39 GHz, 1.25 GB of Ram ( i know its really old)

Removed, see my PM Nazz.

didnt receive any PMs

Hi,
please read THIS post, and open new topic in Virus, Spyware & Malware Removal forum.

Thanks to all for sharing this information.