random freezing and crashes

[WTFPC?]

my computer is getting disk read errors almost every time I start my pc, and it freezes and crashes a lot

heres my hjt
Logfile of HijackThis v1.99.1
Scan saved at 2:51:49 PM, on 2/4/2007
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\system32\nvsvc32.exe
C:\Program Files\Common Files\Symantec Shared\ccApp.exe
C:\Program Files\Logitech\iTouch\iTouch.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
C:\Program Files\Logitech\MouseWare\system\em_exec.exe
C:\Program Files\Microsoft AntiSpyware\gcasDtServ.exe
C:\Program Files\Common Files\Symantec Shared\Security Center\SymWSC.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Xfire\Xfire.exe
C:\Program Files\iTunes\iTunes.exe
C:\Program Files\Messenger\msmsgs.exe
C:\Documents and Settings\Wesley\My Documents\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.games-fusion.net
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.games-fusion.net
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = localhost
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: NAV Helper - {BDF3E430-B101-42AD-A544-FADC6B084872} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O3 - Toolbar: Norton AntiVirus - {42CDD1BF-3FFB-4238-8AD1-7859DF00B1D6} - C:\Program Files\Norton AntiVirus\NavShExt.dll
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [SW20] C:\WINDOWS\system32\sw20.exe
O4 - HKLM\..\Run: [SW24] C:\WINDOWS\system32\sw24.exe
O4 - HKLM\..\Run: [ccApp] C:\Program Files\Common Files\Symantec Shared\ccApp.exe
O4 - HKLM\..\Run: [ccRegVfy] C:\Program Files\Common Files\Symantec Shared\ccRegVfy.exe
O4 - HKLM\..\Run: [Symantec NetDriver Monitor] C:\PROGRA~1\SYMNET~1\SNDMon.exe /Consumer
O4 - HKLM\..\Run: [gcasServ] "C:\Program Files\Microsoft AntiSpyware\gcasServ.exe"
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [zBrowser Launcher] C:\Program Files\Logitech\iTouch\iTouch.exe
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKCU\..\Run: [LDM] C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LogitechDesktopMessenger.exe
O4 - HKCU\..\Run: [Steam] "c:\program files\steam\steam.exe" -silent
O4 - HKCU\..\Run: [ProxyWay] C:\Program Files\ProxyWay\proxyway.exe
O4 - HKCU\..\Run: [EA Core] C:\Program Files\Electronic Arts\EA Downloader\Core.exe -silent
O4 - HKCU\..\Run: [BitTorrent] "C:\Program Files\BitTorrent\bittorrent.exe" --force_start_minimized
O4 - HKCU\..\Run: [Aim6] "C:\Program Files\AIM6\aim6.exe" /d locale=en-US ee://aol/imApp
O4 - Startup: Xfire.lnk = C:\Program Files\Xfire\Xfire.exe
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Logitech Desktop Messenger.lnk = C:\Program Files\Logitech\Desktop Messenger\8876480\Program\LDMConf.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE
O4 - Global Startup: Symantec Fax Starter Edition Port.lnk = C:\Program Files\Microsoft Office\Office\1033\OLFSNT40.EXE
O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Program Files\AIM\aim.exe
O9 - Extra button: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - C:\Program Files\PartyGaming\PartyPoker\RunApp.exe (file missing)
O9 - Extra 'Tools' menuitem: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - C:\Program Files\PartyGaming\PartyPoker\RunApp.exe (file missing)
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: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1133554782515
O16 - DPF: {CD995117-98E5-4169-9920-6C12D4C0B548} (HGPlugin9USA Class) - http://gamedownload.ijjimax.com/gamedownload/dist/hgstart/HGPlugin9USA.cab
O16 - DPF: {DECEAAA2-370A-49BB-9362-68C3A58DDC62} (SAIX) - http://static.zangocash.com/cab/Zan...817ec238c463:a4208bfa02bc00c28518a46b1946de0c
O18 - Protocol: bw+0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw+0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw-0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw-0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw00 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw00s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw10 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw10s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw20 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw20s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw30 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw30s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw40 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw40s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw50 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw50s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw60 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw60s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw70 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw70s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw80 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw80s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw90 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bw90s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwa0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwa0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwb0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwb0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwc0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwc0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwd0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwd0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwe0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwe0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwf0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwf0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwfile-8876480 - {9462A756-7B47-47BC-8C80-C34B9B80B32B} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\GAPlugProtocol-8876480.dll
O18 - Protocol: bwg0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwg0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwh0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwh0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwi0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwi0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwj0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwj0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwk0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwk0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwl0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwl0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwm0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwm0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwn0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwn0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwo0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwo0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwp0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwp0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwq0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwq0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwr0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwr0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bws0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bws0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwt0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwt0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwu0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwu0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwv0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwv0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bww0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bww0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwx0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwx0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwy0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwy0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwz0 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: bwz0s - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O18 - Protocol: offline-8876480 - {7CF9E90D-F00F-4A26-9A97-583084BA8BF8} - C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BWPlugProtocol-8876480.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation Service (ccPwdSvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccPwdSvc.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPodService - Apple Computer, Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Norton AntiVirus Auto Protect Service (navapsvc) - Symantec Corporation - C:\Program Files\Norton AntiVirus\navapsvc.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: ScriptBlocking Service (SBService) - Symantec Corporation - C:\PROGRA~1\COMMON~1\SYMANT~1\SCRIPT~1\SBServ.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
O23 - Service: SymWMI Service (SymWSC) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\Security Center\SymWSC.exe

 

[PC eye]

There's nothing seen in the log here even suspicious enough to suspect any virus infection. Your most likely problem is either you are seeing high temps pointing towards an impending hardware failure or with low temps are seeing corruption of system files by crosslinks. Symantec softwares like Norton as well are known to be "resource hungry". I noticed Steam and Symantec should be disabled when running Steam's Source engine to avoid software conflicts. Messenger shouldn't hassle Steam however.

Two values are seen that could use a little fixing however since these are inactive.
O9 - Extra button: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - C:\Program Files\PartyGaming\PartyPoker\RunApp.exe (file

O9 - Extra 'Tools' menuitem: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - C:\Program Files\PartyGaming\PartyPoker\RunApp.exe (file missing)

CCleaner and another freeware are a pair of tools for cleaning up things on the drive as well as in the system registry itself. Invalid entries that software uninstallers fail to remove can cause a number of problems over a period of time. CCleaner is found at http://www.ccleaner.com

The other freeware is RegCleaner found at http://www.majorgeeks.com/RegCleaner_d460.html Once a registry or hard drive starts getting loaded with junk Windows will see slowdowns and even crashes. Try fixing the two values there and give these a try to see if the problems remain. Just watch out that CCleaner doesn't automatically remove any loose files saved in custom folders you want to keep.