My computer's task manager and Registry Editor are being disabled. Another trouble is yahoo messenger automatically sends messages to all my contacts, and changes custom messages.

Any help would be much appreciated.

Logfile of HijackThis v1.99.1
Scan saved at 2:38:17 PM, on 12/5/2006
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
D:\Program Files\Sygate\SPF\smc.exe
C:\WINDOWS\system32\spoolsv.exe
G:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
C:\Program Files\Eset\nod32krn.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\System32\svchost.exe
C:\PROGRA~1\COMMON~1\Stardock\SDMCP.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\System32\nvraidservice.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\System32\wbem\unsecapp.exe
C:\WINDOWS\system32\RUNDLL32.EXE
G:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe
C:\Program Files\Eset\nod32kui.exe
C:\Program Files\NVTray\NVTray.exe
G:\Program Files\Samurize\Client.exe
G:\PROGRA~1\Stardock\OBJECT~1\DesktopX\dxwidget.exe
G:\PROGRA~1\Stardock\OBJECT~1\DesktopX\dxwidget.exe
G:\HJT\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://tuvantinhyeu.info
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = socks=24.62.101.196:3380
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - (no file)
O2 - BHO: IDMIEHlprObj Class - {0055C089-8582-441B-A0BF-17B458C2A3A8} - D:\Program Files\Internet Download Manager\IDMIECC.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - D:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: AcroIEToolbarHelper Class - {AE7CD045-E861-484f-8273-0445EE161910} - D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O2 - BHO: TGTSoft Explorer Toolbar Changer - {C333CF63-767F-4831-94AC-E683D962C63C} - C:\Program Files\TGTSoft\StyleXP\TGT_BHO.dll
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll
O4 - HKLM\..\Run: [NVRaidService] C:\WINDOWS\System32\nvraidservice.exe
O4 - HKLM\..\Run: [NVMixerTray] "C:\Program Files\NVIDIA Corporation\NvMixer\NVMixerTray.exe"
O4 - HKLM\..\Run: [SmcService] D:\PROGRA~1\Sygate\SPF\smc.exe -startgui
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [ISUSPM Startup] C:\PROGRA~1\COMMON~1\INSTAL~1\UPDATE~1\isuspm.exe -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [amd_dc_opt] "C:\Program Files\AMD\amd_dc_opt\amd_dc_opt.exe"
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: [!AVG Anti-Spyware] "G:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKLM\..\Run: [nod32kui] "C:\Program Files\Eset\nod32kui.exe" /WAITSERVICE
O4 - HKCU\..\Run: [NVTray] C:\Program Files\NVTray\NVTray.exe
O4 - HKCU\..\Run: [STYLEXP] C:\Program Files\TGTSoft\StyleXP\StyleXP.exe -Hide
O4 - Startup: Azenis2 Clock.lnk = G:\Program Files\Stardock\Object Desktop\DesktopX\Widgets\Azenis2 Clock.exe
O4 - Startup: Client Default.lnk = G:\Program Files\Samurize\Client.exe
O4 - Startup: Silica Calendar.lnk = G:\Program Files\Stardock\Object Desktop\DesktopX\Widgets\Silica Calendar.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: Convert link target to Adobe PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert link target to existing PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert selected links to Adobe PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECaptureSelLinks.html
O8 - Extra context menu item: Convert selected links to existing PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppendSelLinks.html
O8 - Extra context menu item: Convert selection to Adobe PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert selection to existing PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Convert to Adobe PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIECapture.html
O8 - Extra context menu item: Convert to existing PDF - res://D:\Program Files\Adobe\Acrobat 7.0\Acrobat\AcroIEFavClient.dll/AcroIEAppend.html
O8 - Extra context menu item: Download All Links with IDM - D:\Program Files\Internet Download Manager\IEGetAll.htm
O8 - Extra context menu item: Download with IDM - D:\Program Files\Internet Download Manager\IEExt.htm
O8 - Extra context menu item: E&xport to Microsoft Excel - res://D:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - D:\Program Files\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra button: EmpirePoker - {77E68763-4284-41d6-B7E7-B6E1F053A9E7} - D:\Program Files\EmpirePoker\EmpirePoker.exe (file missing)
O9 - Extra 'Tools' menuitem: EmpirePoker - {77E68763-4284-41d6-B7E7-B6E1F053A9E7} - D:\Program Files\EmpirePoker\EmpirePoker.exe (file missing)
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - D:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - D:\Program Files\PartyGaming\PartyPoker\RunApp.exe (file missing)
O9 - Extra 'Tools' menuitem: PartyPoker.com - {B7FE5D70-9AA2-40F1-9C6B-12A255F085E1} - D:\Program Files\PartyGaming\PartyPoker\RunApp.exe (file missing)
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\PROGRA~1\Yahoo!\MESSEN~1\YPager.exe
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\PROGRA~1\Yahoo!\MESSEN~1\YPager.exe
O9 - Extra button: Bodog Poker - {F47C1DB5-ED21-4dc1-853E-D1495792D4C5} - D:\Program Files\Bodog Poker\GameClient.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/microsoftupdat…b?1165343228734
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdat…b?1165343223625
O16 - DPF: {9522B3FB-7A2B-4646-8AF6-36E7F593073C} (cpbrkpie Control) - http://a19.g.akamai.net/7/19/7125/4058/ftp…302/Coupons.cab
O16 - DPF: {A18962F6-E6ED-40B1-97C9-1FB36F38BFA8} (Aurigma Image Uploader 3.5 Control) - http://www.dotphoto.com/DPImageUploader.cab
O16 - DPF: {D8601794-A193-4A2D-BE2B-BA652A291389} (MediaSoftRun Control) - http://down.media-soft.co.kr/mediasoft/act…ediaSoftRun.cab
O18 - Protocol: Festoon - (no CLSID) - (no file)
O20 - Winlogon Notify: Antiwpa - C:\WINDOWS\SYSTEM32\antiwpa.dll
O20 - Winlogon Notify: MCPClient - C:\PROGRA~1\COMMON~1\Stardock\mcpstub.dll
O21 - SSODL: IconPackager Repair - {1799460C-0BC8-4865-B9DF-4A36CD703FF0} - G:\Program Files\Stardock\Object Desktop\IconPackager\iprepair.dll
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: AVG Anti-Spyware Guard - Anti-Malware Development a.s. - G:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: NBService - Nero AG - G:\Program Files\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: NOD32 Kernel Service (NOD32krn) - Eset - C:\Program Files\Eset\nod32krn.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Sygate Personal Firewall Pro (SmcService) - Sygate Technologies, Inc. - D:\Program Files\Sygate\SPF\smc.exe
O23 - Service: StarWind iSCSI Service (StarWindService) - Rocket Division Software - D:\Program Files\Alcohol Soft\Alcohol 120\StarWind\StarWindService.exe
O23 - Service: StyleXPService - Unknown owner - C:\Program Files\TGTSoft\StyleXP\StyleXPService.exe