i can't start task manager on my xp sp2, i think it's due to a virus. when i try reg editor it enables, but if i close task manager, again the value in registry changes from '0' to '1' automatically !!! please help me...

it's my trend micro hijack report -

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 4:27:57 PM, on 8/28/2010
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Boot mode: Normal

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:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\QUICKH~1\QUICKH~1\SAPISSVC.EXE
C:\Program Files\Sony Ericsson\Sony Ericsson PC Suite\SupServ.exe
C:\PROGRA~1\QUICKH~1\QUICKH~1\opssvc.exe
C:\PROGRA~1\QUICKH~1\QUICKH~1\quhlpsvc.exe
C:\PROGRA~1\QUICKH~1\QUICKH~1\scanwscs.exe
C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesService32.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesApp32.exe
C:\PROGRA~1\QUICKH~1\QUICKH~1\EMLPROXY.EXE
C:\PROGRA~1\QUICKH~1\QUICKH~1\onlinent.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\lsass.exe
C:\Program Files\Internet Download Manager\IEMonitor.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Sony Ericsson\Sony Ericsson PC Suite\SEPCSuite.exe
C:\Program Files\Opera\opera.exe
C:\Program Files\TuneUp Utilities 2010\integrator.exe
C:\Program Files\TuneUp Utilities 2010\RegistryEditor.exe
C:\WINDOWS\system32\mmc.exe
C:\Program Files\Internet Download Manager\IDMan.exe
C:\Documents and Settings\tempppppppp\My Documents\Downloads\Programs\hijackthis.exe

O2 - BHO: IDM Helper - {0055C089-8582-441B-A0BF-17B458C2A3A8} - C:\Program Files\Internet Download Manager\IDMIECC.dll
O2 - BHO: CIEProtection - {02D6B6B3-5D97-4EDE-AAC1-4D0BE8FE9CD3} - C:\PROGRA~1\QUICKH~1\QUICKH~1\qhiepro.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Quick Heal Toolbar - {5C6227F4-39E2-4468-B69E-29AEB12A7F88} - C:\PROGRA~1\QUICKH~1\QUICKH~1\antiphis.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\PROGRA~1\MICROS~2\Office12\GRA8E1~1.DLL
O2 - BHO: Anti Popup - {EFCA9D4B-F2E8-487d-8505-E4D0E459ABFE} - C:\PROGRA~1\QUICKH~1\QUICKH~1\apop.dll
O3 - Toolbar: (no name) - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - (no file)
O3 - Toolbar: Quick Heal Toolbar - {5C6227F4-39E2-4468-B69E-29AEB12A7F88} - C:\PROGRA~1\QUICKH~1\QUICKH~1\antiphis.dll
O4 - HKLM\..\Run: [Quick Heal Core UI] C:\PROGRA~1\QUICKH~1\QUICKH~1\strtupap.exe
O4 - HKLM\..\RunOnce: [Startup Scan] C:\PROGRA~1\QUICKH~1\QUICKH~1\Sensor.EXE /check
O4 - HKCU\..\Run: [Sony Ericsson PC Suite] "C:\Program Files\Sony Ericsson\Sony Ericsson PC Suite\SEPCSuite.exe" /systray /nologon
O4 - HKCU\..\Run: [IDMan] C:\Program Files\Internet Download Manager\IDMan.exe /onboot
O7 - HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System, DisableRegedit=1
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\WINDOWS\system32\GPhotos.scr/200
O8 - Extra context menu item: Download all links with IDM - C:\Program Files\Internet Download Manager\IEGetAll.htm
O8 - Extra context menu item: Download FLV video content with IDM - C:\Program Files\Internet Download Manager\IEGetVL.htm
O8 - Extra context menu item: Download with IDM - C:\Program Files\Internet Download Manager\IEExt.htm
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: Send to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: S&end to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {644E432F-49D3-41A1-8DD5-E099162EEEC5} (Symantec RuFSI Utility Class) - http://security.symantec.com/sscv6/SharedContent/common/bin/cabsa.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{5F914319-6371-42AA-8D00-6FBE73DE10B7}: NameServer = 202.56.230.5 202.56.230.6
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\PROGRA~1\MICROS~2\Office12\GR99D3~1.DLL
O22 - SharedTaskScheduler: Browseui preloader - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Component Categories cache daemon - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: Core Mail Protection - Quick Heal Technologies (P) Ltd. - C:\PROGRA~1\QUICKH~1\QUICKH~1\EMLPROXY.EXE
O23 - Service: Core Scanning Server - Quick Heal Technologies (P) Ltd. - C:\PROGRA~1\QUICKH~1\QUICKH~1\SAPISSVC.EXE
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Program Files\Common Files\Ahead\Lib\NMIndexingService.exe
O23 - Service: Sony Ericsson OMSI download service (OMSI download service) - Unknown owner - C:\Program Files\Sony Ericsson\Sony Ericsson PC Suite\SupServ.exe
O23 - Service: Online Protection System - Quick Heal Technologies (P) Ltd. - C:\PROGRA~1\QUICKH~1\QUICKH~1\opssvc.exe
O23 - Service: Quick Update Service - Quick Heal Technologies (P) Ltd. - C:\PROGRA~1\QUICKH~1\QUICKH~1\quhlpsvc.exe
O23 - Service: Total Security Helper Service WSC (ScanWscS) - Quick Heal Technologies (P) Ltd. - C:\PROGRA~1\QUICKH~1\QUICKH~1\scanwscs.exe
O23 - Service: TuneUp Drive Defrag Service (TuneUp.Defrag) - TuneUp Software - C:\Program Files\TuneUp Utilities 2010\TuneUpDefragService.exe
O23 - Service: TuneUp Utilities Service (TuneUp.UtilitiesSvc) - TuneUp Software - C:\Program Files\TuneUp Utilities 2010\TuneUpUtilitiesService32.exe

--
End of file - 5930 bytes

Here's your To Do List:

Reset IE

Uninstall all downloaded programs that you can ... like tools that are suppose to clean, repair, optimize, or tune-up your PC.

Run download and run the following programs: Malwarebytes Anti-Malware, Emisoft Anti-Malware.

Install, update, and run an anti-virus program (I like Avast! Free).

Turn on windows firewall

Try to use the registry editor. If it fails again, Create a new administrator account and try to run it as that user.

Post any problems you run into. This may be a long process, so don't be shy to ask for more details.

Good Luck

Or possibly you have some malware which is trying to hide itself by that simple trick. Here is another sign of it:
O7 - HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System, DisableRegedit=1
==Please download Malwarebytes' Anti-Malware
from: http://www.majorgeeks.com/Malwarebytes_Anti-Malware_d5756.html
or: http://www.besttechie.net/tools/mbam-setup.exe
=Dclick that file, mbam-setup.exe, to install the application,
-ensure that it is set to update and start, else start it via the icon, and UPDATE it.
Select "Perform QUICK Scan", then click Scan; the application will guide you through the remaining steps.
ENSURE that EVERYTHING found has a CHECKMARK against it, then click Remove Selected.
If malware has been found [and removed] MBAM will automatically produce a log for you when it completes... do not click the Save Logfile button.
Examine the log: if some files are listed as Delete on Reboot then restart your machine before continuing.
Copy and post that log [it is also saved under Logs tab in MBAM].

If you find that you can't complete any of these tasks, it may help to do the following and try again:

Hold the windows key and press R

Type the following and press ENTER: msconfig

On the Services tab,
-check the box to hide Microsoft Services and then
-click the button to Disable All

On the startup tab,
-click the button to Disable All

Click OK and you will be prompted to restart the computer.

After you have re booted and removed malware, you will want to open the Microsoft configuration utility and check the box for normal startup on the General tab.

** Note that some programs will not work while items are disabled via msconfig including most anti-virus programs! That's the point ... malware are programs too! If you know which services and startup items belong to your Anti-virus Program, you could check them, so they are not disabled with everything else.
Good Luck

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