I think i am hit by a virus/spyware. I got a windows security alert balloon. when i restarted my computer, it disappeared but my desktop background is stuck with a blue color and when i try to change it, the option seems to be locked or diabled. I tried to delete all spyware using AVG anti-spyware. Though it shows Deleted, the problem still exists. Your help to resolve this problem will be appreciated.

I am posting a copy of the log file:

Logfile of HijackThis v1.99.1
Scan saved at 6:59:13 PM, on 2/1/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
Running processes:
D:\WINDOWS\System32\smss.exe
D:\WINDOWS\system32\winlogon.exe
D:\WINDOWS\system32\services.exe
D:\WINDOWS\system32\lsass.exe
D:\WINDOWS\system32\svchost.exe
D:\WINDOWS\SYSTEM32\SVCHOST.EXE
D:\WINDOWS\system32\ACS.exe
D:\WINDOWS\system32\spoolsv.exe
D:\WINDOWS\Explorer.EXE
D:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
D:\Program Files\TOSHIBA\Power Management\CeEPwrSvc.exe
D:\WINDOWS\system32\DVDRAMSV.exe
D:\WINDOWS\system32\igfxtray.exe
D:\WINDOWS\system32\hkcmd.exe
D:\WINDOWS\system32\dla\tfswctrl.exe
D:\Program Files\EzButton\EzButton.EXE
D:\Program Files\TOSHIBA\E-KEY\CeEKey.exe
D:\Program Files\TOSHIBA\Power Management\CePMTray.exe
D:\Program Files\ltmoh\Ltmoh.exe
D:\WINDOWS\AGRSMMSG.exe
C:\TOSHIBA\IVP\ISM\pinger.exe
D:\Program Files\Winamp\winampa.exe
D:\WINDOWS\system32\LVCOMSX.EXE
D:\Program Files\Common Files\Real\Update_OB\realsched.exe
D:\PROGRAM FILES\GRISOFT\AVG ANTI-SPYWARE 7.5\AVGAS.EXE
D:\Program Files\Messenger\msmsgs.exe
D:\Program Files\MSN Messenger\MsnMsgr.Exe
D:\Program Files\Google\GoogleToolbarNotifier\1.2.908.8472\GoogleToolbarNotifier.exe
D:\WINDOWS\system32\ctfmon.exe
D:\WINDOWS\system32\svchost.exe
c:\TOSHIBA\IVP\swupdate\swupdtmr.exe
D:\WINDOWS\system32\RAMASST.exe
D:\Program Files\WinZip\WZQKPICK.EXE
D:\WINDOWS\system32\wscntfy.exe
D:\WINDOWS\system32\wuauclt.exe
D:\PROGRAM FILES\INTERNET EXPLORER\IEXPLORE.EXE
D:\WINDOWS\system32\wuauclt.exe
D:\Program Files\Internet Explorer\IEXPLORE.EXE
D:\PROGRA~1\WINZIP\winzip32.exe
D:\Documents and Settings\Saju Abraham K\Local Settings\Temp\HijackThis.exe
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://us.rd.yahoo.com/customize/ie/...ch/search.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://us.rd.yahoo.com/customize/ie/.../www.yahoo.com
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - D:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - D:\WINDOWS\system32\dla\tfswshx.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - d:\program files\google\googletoolbar2.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - d:\program files\google\googletoolbar2.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - D:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [IgfxTray] D:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] D:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [dla] D:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [EzButton] D:\Program Files\EzButton\EzButton.EXE
O4 - HKLM\..\Run: [CeEKEY] D:\Program Files\TOSHIBA\E-KEY\CeEKey.exe
O4 - HKLM\..\Run: [CeEPOWER] D:\Program Files\TOSHIBA\Power Management\CePMTray.exe
O4 - HKLM\..\Run: [LtMoh] D:\Program Files\ltmoh\Ltmoh.exe
O4 - HKLM\..\Run: [AGRSMMSG] AGRSMMSG.exe
O4 - HKLM\..\Run: [PINGER] C:\TOSHIBA\IVP\ISM\pinger.exe /run
O4 - HKLM\..\Run: [WinampAgent] D:\Program Files\Winamp\winampa.exe
O4 - HKLM\..\Run: [LVCOMSX] D:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [TkBellExe] "D:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [pccguide.exe] "D:\Program Files\Trend Micro\Internet Security 2006\pccguide.exe"
O4 - HKLM\..\Run: [!AVG Anti-Spyware] "D:\Program Files\Grisoft\AVG Anti-Spyware 7.5\avgas.exe" /minimized
O4 - HKCU\..\Run: [MSMSGS] "D:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [MsnMsgr] "D:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [swg] D:\Program Files\Google\GoogleToolbarNotifier\1.2.908.8472\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [ctfmon.exe] D:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: RAMASST.lnk = D:\WINDOWS\system32\RAMASST.exe
O4 - Global Startup: WinZip Quick Pick.lnk = D:\Program Files\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: E&xport to Microsoft Excel - res://D:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - D:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - D:\PROGRA~1\Yahoo!\MESSEN~1\YPager.exe (file missing)
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - D:\PROGRA~1\Yahoo!\MESSEN~1\YPager.exe (file missing)
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - D:\Program Files\Messenger\msmsgs.exe
O12 - Plugin for .spop: D:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "D:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O20 - Winlogon Notify: igfxcui - D:\WINDOWS\SYSTEM32\igfxsrvc.dll
O23 - Service: Atheros Configuration Service (ACS) - Unknown owner - D:\WINDOWS\system32\ACS.exe
O23 - Service: AVG Anti-Spyware Guard - Anti-Malware Development a.s. - D:\Program Files\Grisoft\AVG Anti-Spyware 7.5\guard.exe
O23 - Service: CeEPwrSvc - COMPAL ELECTRONIC INC. - D:\Program Files\TOSHIBA\Power Management\CeEPwrSvc.exe
O23 - Service: DVD-RAM_Service - Matsushita Electric Industrial Co., Ltd. - D:\WINDOWS\system32\DVDRAMSV.exe
O23 - Service: Trend Micro Central Control Component (PcCtlCom) - Trend Micro Incorporated. - D:\PROGRA~1\TRENDM~1\INTERN~1\PcCtlCom.exe
O23 - Service: Swupdtmr - Unknown owner - c:\TOSHIBA\IVP\swupdate\swupdtmr.exe
O23 - Service: Trend Micro Real-time Service (Tmntsrv) - Trend Micro Incorporated. - D:\PROGRA~1\TRENDM~1\INTERN~1\Tmntsrv.exe
O23 - Service: Trend Micro Personal Firewall (TmPfw) - Trend Micro Inc. - D:\PROGRA~1\TRENDM~1\INTERN~1\TmPfw.exe
O23 - Service: Trend Micro Proxy Service (tmproxy) - Trend Micro Inc. - D:\PROGRA~1\TRENDM~1\INTERN~1\tmproxy.exe