Huge Problem with my Computer

[Shawk]

Hi, for atleast 2 months now my computer has been running like complete crap, but in games it isnt that noticable so I have just been ignoring it. Anyways.. my problem is, my internet explorer is running very slow, sometimes a site comes up and sometimes it decides not to, but if i refresh the site about 10 times it will eventually come up but with some really bad graphics, but like right now, sometimes it just magicly works.
Downloading also is not working properly either, when i'm download something it will go very fast at the start but slowly die down to something like 1kb/sec then jump back to 100kb/sec (using fileplanet I should be getting about 200k/sec with my subscription, but i'm only getting about 1 - 100 and it rarely makes it to 100)

Anyways.. Ive tried to reformat 3 times and it has never done anything, the first time i reformated was because something was wrong with my cpu, every 2 seconds or so my mouse would stop and my Cpu would jump from 0% to 100% for a breif second and then jump back down and do it again 5 seconds later, so i switched my ram around trying to figure out what the hell it was, and it worked, for about 2 days, then it happend again, so i switched the ram again, and it worked again.

Now that i'm on my 4th time reformating ive noticed when i try to restart my computer i get this error saying the computer needs to close WINRAR, which I have not had in my computer since my first reformat, so it's like my computer is not reformating properly.

This probably made no sence.. sorry, but thats the best way I can explain it, heres my Hijack log.

Logfile of HijackThis v1.98.2
Scan saved at 4:01:16 PM, on 10/19/2004
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\System32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\System32\alg.exe
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\WINDOWS\system32\wpabaln.exe
C:\WINDOWS\system32\regsvr32.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Download Manager\IDMan.exe
C:\Program Files\Hijack\HijackThis.exe

O2 - BHO: IDM Helper - {0055C089-8582-441B-A0BF-17B458C2A3A8} - C:\Program Files\Internet Download Manager\IDMIECC.dll
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [] "%1" %*
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [IDMan] C:\Program Files\Internet Download Manager\IDMan.exe /onboot
O4 - HKCU\..\Run: [LTM2] C:\WINDOWS\litmus\MSGSRV32.exe
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
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: ppctlcab - http://www.pestscan.com/scanner/ppctlcab.cab
O16 - DPF: {2FC9A21E-2069-4E47-8235-36318989DB13} (PPSDKActiveXScanner.MainScreen) - http://www.pestscan.com/scanner/axscanner.cab
O16 - DPF: {39B0684F-D7BF-4743-B050-FDC3F48F7E3B} (FilePlanet Download Control Class) - http://www.fileplanet.com/fpdlmgr/ca...C_1_0_0_44.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://v5.windowsupdate.microsoft.co...?1097546712859