CPU running at 100% - Spyware?

HI,
I had the cws hijacker on my system and used cws shredder to remove it which it says it has done successfully. However when i run a free scan from Spyware Begone (they want you to register the software to remove the problems) it says there is still a CWS Browser Hijacker present. I have also run adaware and Spybot search and destroy. Spywareblaster and spywaregaurd are running though were installed after these problems started. I am also running Regprot

I have previously run Hijackthis and deleted a few lines successfully (with the help of another website) but am now at a loss as to what is affecting my computer.

My pc runs fine for a couple of minutes but then slows right down, the task manager shows CPU running at 100% all the time.

Any help much apppreciated. Have tried all I can now slightly Below is my new hijack this log:

Logfile of HijackThis v1.97.7
Scan saved at 17:10:00, on 08/07/2004
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

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\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
G:\PROGRA~1\vptray.exe
F:\daemon tools\daemon.exe
C:\Program Files\Ahead\InCD\InCD.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\docume~1\user\locals~1\temp\rar$ex07.062\regprot.exe
C:\WINDOWS\System32\ctfmon.exe
G:\Program Files\defwatch.exe
G:\freescan.exe
G:\Program Files\rtvscan.exe
G:\SpywareGuard\sgmain.exe
C:\WINDOWS\System32\svchost.exe
G:\SpywareGuard\sgbhp.exe
C:\WINDOWS\System32\MsgSys.EXE
C:\WINDOWS\System32\wuauclt.exe
G:\Share\EZ\Hijakthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.lancaster.ac.uk/iss/labshome
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - F:\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: ie - {2FF5573C-0EB5-43db-A1B2-C4326813468E} - c:\windows\iehr.dll
O2 - BHO: SpywareGuard Download Protection - {4A368E80-174F-4872-96B5-0B27DDD11DB2} - G:\SpywareGuard\dlprotect.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - G:\Spybot - Search & Destroy\SDHelper.dll
O4 - HKLM\..\Run: [vptray] G:\PROGRA~1\vptray.exe
O4 - HKLM\..\Run: [DAEMON Tools-1033] "F:\daemon tools\daemon.exe" -lang 1033
O4 - HKLM\..\Run: [NeroCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [InCD] C:\Program Files\Ahead\InCD\InCD.exe
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [RegProt] c:\docume~1\user\locals~1\temp\rar$ex07.062\regprot.exe /start
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [Spyware Begone] G:\freescan.exe -FastScan
O4 - Startup: PowerReg Scheduler.exe
O4 - Startup: SpywareGuard.lnk = G:\SpywareGuard\sgmain.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://F:\PROGRA~1\MICROS~1\OFFICE11\EXCEL.EXE/3000
O16 - DPF: {02BF25D5-8C17-4B23-BC80-D3488ABDDC6B} (QuickTime Object) - http://www.apple.com/qtactivex/qtplugin.cab
O16 - DPF: {10003000-1000-0000-1000-000000000000} - ms-its:mhtml:file://c:\nosuch.mht!http://66.230.167.185/z/aw/chm/cool.chm::/cool.exe
O16 - DPF: {166B1BCA-3F9C-11CF-8075-444553540000} (Shockwave ActiveX Control) - http://download.macromedia.com/pub/shockwave/cabs/director/sw.cab
O16 - DPF: {2BC66F54-93A8-11D3-BEB6-00105AA9B6AE} (Symantec AntiVirus scanner) - http://security.symantec.com/sscv6/SharedContent/vc/bin/AvSniff.cab
O16 - DPF: {31B7EB4E-8B4B-11D1-A789-00A0CC6651A8} (Cult3D ActiveX Player) - http://www.cult3d.com/download/cult.cab
O16 - DPF: {41F17733-B041-4099-A042-B518BB6A408C} - http://a1540.g.akamai.net/7/1540/52...pple.com/bonnie/us/win/QuickTimeInstaller.exe
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O16 - DPF: {72C23FEC-3AF9-48FC-9597-241A8EBDFE0A} (InstallShield International Setup Player) - http://ftp.hp.com/pub/automatic/player/isetupML.cab
O16 - DPF: {9F1C11AA-197B-4942-BA54-47A8489BB47F} (Update Class) - http://v4.windowsupdate.microsoft.com/CAB/x86/unicode/iuctl.CAB?37991.6833796296
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab