hi,
system details:
Xp Pro V2002 SP 2,v.2096
Pentium(R) 4 CPU 2.93GHz
248 MB RAM
No mozilla or firefox used.
Windows Firewall OFF.

I am the administrator.

problems :
(Had trojan Antivirus XP 2008 - removed it from control panel and deleted files from documents nad settgs/ all users/startup/programs.But the following problems are still haunting my leftover senses :scatter: )
1. blue wallpaper with a yellow rectangle saying "Warning! Spyware detected on your computer! Install an antivirus or spyware remover to clean your computer." I tried to remove the wallpaper but Display Properties shows only 3 tabs-themes,appearance,settings.(but wallpaper was changed when i rt-clicked on an image and set it as desktop backgrnd)
2.CtrlAltDel shows "Task Manager has been disabled by your administrator."
3.Running command Regedit shows "Registry editing has been disabled by your administrator."
4.Running gpedit.msc -In the left part of window clicking User Configuration/Administrative Templates/System : In the right part disabling "Prevent acess to registry editing tools" : Then restarting does not help.(Similar change was done for CtrlAltDel options but to no result)
5.As soon as i click any download link an error mssg appears-"Error while unpacking program , code LP5.Please report to author." after that sometimes download proceeds normally and other times it ends prematurely.
5.Downloaded Spyware Terminator 2.3.0.487 (free version).The scan report says no threats.
6.Avira personal edition classic (from download.com)- apparently nothing happens on starting avgnt.exe ( i had kept it continuously updated)
on starting avscan.exe -"INVALID PARAMETER The application will be closed!"
on starting setup.exe - The CRC sum of C:\Progr.....\setup.exe has been changed! This could be due to a virus!Do you want to shut down Setup?"
7.If it suggests anything i noticed I am not able to open sites like majorgeeks,avira's site or for that matter sites tht can help me out.I found your site from google and was able to open it.
8.Here is the HijackThis logfile -

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 5:14:23 AM, on 8/15/2008
Platform: Windows XP SP2, v.2096 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2096)
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:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\WINDOWS\Explorer.exe
C:\WINDOWS\system32\lphcn7pj0e1c3.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\wuauclt.exe
C:\DOCUME~1\Mr\LOCALS~1\Temp\winsdafhh.exe
C:\DOCUME~1\Mr\LOCALS~1\Temp\winurjybk.exe
C:\Program Files\Spyware Terminator\sp_rsser.exe
C:\Program Files\Spyware Terminator\SpywareTerminatorShield.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://reliancebroadband.co.in/home?...bow&t=faskvxqb
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\YAHOO!\Companion\Installs\cpn\yt.dll (file missing)
F2 - REG:system.ini: Shell=Explorer.exe "C:\WINDOWS\system32\wpx121.cpx"
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,C:\WINDO WS\system32\drivers\services.exe
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Documents and Settings\Mr\My Documents\rpbrowserrecordplugin.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\system32\msdxm.ocx
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\YAHOO!\Companion\Installs\cpn\yt.dll (file missing)
O4 - HKLM\..\Run: [googletalk] C:\Program Files\Google\Google Talk\googletalk.exe /autostart
O4 - HKLM\..\Run: [lphcn7pj0e1c3] C:\WINDOWS\system32\lphcn7pj0e1c3.exe
O4 - HKLM\..\Run: [SMrhcj7pj0e1c3] C:\Program Files\rhcj7pj0e1c3\rhcj7pj0e1c3.exe
O4 - HKLM\..\Run: [WinampAgent] "C:\Program Files\Winamp\winampa.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [SpywareTerminator] "C:\Program Files\Spyware Terminator\SpywareTerminatorShield.exe"
O4 - HKCU\..\Run: [iexplorer] C:\WINDOWS\iexplorer.exe --system
O4 - HKUS\S-1-5-18\..\Run: [Nokia.PCSync] "C:\Program Files\Nokia\Nokia PC Suite 6\PcSync2.exe" /NoDialog (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\Run: [[system]] C:\WINDOWS\system32\drivers\services.exe (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [Nokia.PCSync] "C:\Program Files\Nokia\Nokia PC Suite 6\PcSync2.exe" /NoDialog (User 'Default user')
O7 - HKCU\Software\Microsoft\Windows\CurrentVersion\Pol icies\System, DisableRegedit=1
O8 - Extra context menu item: &Clean Traces - C:\Program Files\DAP\Privacy Package\dapcleanerie.htm
O8 - Extra context menu item: &Download with &DAP - C:\Program Files\DAP\dapextie.htm
O8 - Extra context menu item: Download &all with DAP - C:\Program Files\DAP\dapextie2.htm
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Yahoo! Services - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\PROGRA~1\YAHOO!\MESSEN~1\YPAGER.EXE (file missing)
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - C:\PROGRA~1\YAHOO!\MESSEN~1\YPAGER.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
O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/wind...?1191879892281
O23 - Service: Avira AntiVir Personal - Free Antivirus Scheduler (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal - Free Antivirus Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Spyware Terminator Realtime Shield Service (sp_rssrv) - Crawler.com - C:\Program Files\Spyware Terminator\sp_rsser.exe
O24 - Desktop Component 1: (no name) - C:\Documents and Settings\Mr\Desktop\results\ClassIV(B)_june07_kol. htm

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End of file - 5175 bytes


All and any suggestions are heartily welcome.:notworthy: