Firstly I hope this post is in the right place

When I boot my computer up at first it runs fine but after a couple of hours of being on it starts to slow down dramatically for no obvious reasons. Programs take forever to open, folders even take forever to open. At first I assumed it must be evilware. I run Mcafee security suite along with ad-aware and spybot and all scanned clean. So I thought I'd come to you guys because I've allways got the answers I've needed from it's users. So I tried to run a Hijack This! scan to help with finding out what was wrong. When I try and run Hijack This however I get a string of error boxes saying I should email the author!
The errors in order are;

An unexpected error occured at procedure:modRegistry_IniGetString(sFile=win.ini,s Section=windows,sValue=load)
Error#62 - Input past end of file

An unexpected error occured at procedure:modRegistry_IniGetString(sFile=win.ini,s Section=windows,sValue=run)
Error#55 - File already open

An unexpected error occured at procedure:modMain_CheckOther1Item()
Error#55 File already open

then the scan comes up :

Logfile of HijackThis v1.98.2
Scan saved at 12:48:45, on 15/12/2004
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\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\spoolsv.exe
C:\WINDOWS\system32\drivers\KodakCCS.exe
c:\PROGRA~1\mcafee.com\vso\mcvsrte.exe
C:\PROGRA~1\McAfee.com\PERSON~1\MPFSERVICE.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\MsPMSPSv.exe
c:\PROGRA~1\mcafee.com\vso\mcshield.exe
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\WINDOWS\AGRSMMSG.exe
C:\PROGRA~1\mcafee.com\agent\mcagent.exe
C:\Program Files\McAfee\McAfee Shared Components\Guardian\CMGrdian.exe
C:\PROGRA~1\McAfee.com\PERSON~1\Mp***ent.exe
C:\PROGRA~1\mcafee.com\vso\mcvsshld.exe
C:\PROGRA~1\McAfee.com\PERSON~1\MpfTray.exe
C:\WINDOWS\system32\gsicon.exe
C:\WINDOWS\system32\dslagent.exe
c:\progra~1\mcafee.com\vso\mcvsescn.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\Java\jre1.5.0\bin\jusched.exe
C:\WINDOWS\vsnpt513.exe
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\McAfee\McAfee Privacy Service\GUARDDOG.EXE
C:\Program Files\McAfee\McAfee Privacy Service\GUARDDOG.EXE
c:\progra~1\mcafee.com\vso\mcvsftsn.exe
C:\Hijack This\HijackThis.exe
C:\WINDOWS\system32\wuauclt.exe

R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://uk.mcafee.com/root/redirects/...asp?affid=0-17
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O2 - BHO: McAfee Privacy Service - {cc4b2ee5-4803-11d7-8a38-00b0d0c6b814} - C:\Program Files\McAfee\McAfee Privacy Service\GDIEHELP.DLL
O3 - Toolbar: McAfee VirusScan - {BA52B914-B692-46c4-B683-905236F6F655} - c:\progra~1\mcafee.com\vso\mcvsshl.dll
O4 - HKLM\..\Run: [OemReset] %systemroot%\OPTIONS\OEMRESET.EXE /AUDIT
O4 - HKLM\..\Run: [StorageGuard] "C:\Program Files\Common Files\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [SiSUSBRG] C:\WINDOWS\SiSUSBrg.exe
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [MCAgentExe] c:\PROGRA~1\mcafee.com\agent\mcagent.exe
O4 - HKLM\..\Run: [MCUpdateExe] C:\PROGRA~1\mcafee.com\agent\mcupdate.exe
O4 - HKLM\..\Run: [VSOCheckTask] "c:\PROGRA~1\mcafee.com\vso\mcmnhdlr.exe" /checktask
O4 - HKLM\..\Run: [McAfee Guardian] C:\Program Files\McAfee\McAfee Shared Components\Guardian\CMGrdian.exe /SU
O4 - HKLM\..\Run: [VirusScan Online] "c:\PROGRA~1\mcafee.com\vso\mcvsshld.exe"
O4 - HKLM\..\Run: [MPFTray] C:\PROGRA~1\McAfee.com\PERSON~1\MpfTray.exe
O4 - HKLM\..\Run: [GSICONEXE] gsicon.exe
O4 - HKLM\..\Run: [DSLAGENTEXE] dslagent.exe USB
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Program Files\Java\jre1.5.0\bin\jusched.exe
O4 - HKLM\..\Run: [SNPT513] C:\WINDOWS\vsnpt513.exe
O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [McRegWiz] C:\PROGRA~1\McAfee.com\Agent\McRegWiz.exe /autorun
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0\bin\npjpi150.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0\bin\npjpi150.dll
O9 - Extra button: Privacy Bar - {cc4b2ee5-4803-11d7-8a38-00b0d0c6b814} - C:\Program Files\McAfee\McAfee Privacy Service\GDIEHELP.DLL
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} (McAfee.com Operating System Class) - http://download.mcafee.com/molbin/sh...3/mcinsctl.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} (DwnldGroupMgr Class) - http://download.mcafee.com/molbin/sh...20/mcgdmgr.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{9217A6BF-7D0A-4080-9359-D08D1E5DF537}: NameServer = 194.72.9.34 194.74.65.69

Ive got a Advent t9000 (!) P4 3.0GHz, 512mb ram, if that helps.

I thought that Mcafee Privacy service may be stopping hijack this from scanning but when I turned it off I still got the errors.

Any ideas? Could it be spyware,badware etc. which is hidden from Mcafee, ad-aware and spybot? What are these errors I'm getting from Hijack This!? Is the above log clean?

Or worse of all is this completly normal PC behaviour? I've never experienced this before.

Anyway thanks for reading to here hope someone can help or recomend something because it annoying having a "fast" pc which moves slow!

Cheers Steve

Well I wouldn't say its normal PC Behaviour. Depends how many applications you have running. Sometimes my computer will run fine for a couple of hours then go on a go slow for a few minutes. If I close a few programs and restart them its usually fine. It isn't a common occurence though.

Close all browser windows, restart Hijack This and put a checkmark next to the following entries:

O4 - HKLM\..\Run: [SNPT513] C:\WINDOWS\vsnpt513.exe

Click Fix Checked

Then boot into Safe Mode and ensure that you are showing Hidden Files and Folders.

Delete the following files and folders:
C:\WINDOWS\vsnpt513.exe

Reboot and post a fresh log