my antivirus sw picked up a " Win32:Trojan-gen. {UPX!} " virus.

Logfile of HijackThis v1.97.7
Scan saved at 4:27:11 AM, on 12/26/2003
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Alwil Software\Avast4\ashDisp.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashmaisv.exe
C:\Program Files\Java\j2re1.4.2_01\bin\jusched.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
C:\WINDOWS\System32\devldr32.exe
C:\Program Files\mIRC\mirc.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\Program Files\Executive Software\Diskeeper\DkService.exe
C:\WINDOWS\system32\fxssvc.exe
C:\Program Files\Internet Explorer\iexplore.exe
D:\HijackThis.exe

O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O4 - HKLM..\Run: [WinampAgent] C:\Program Files\Winamp\winampa.exe
O4 - HKLM..\Run: [avast!] C:\Program Files\Alwil Software\Avast4\ashDisp.exe
O4 - HKLM..\Run: [ashMaiSv] C:\PROGRA~1\ALWILS~1\Avast4\ashmaisv.exe
O4 - HKLM..\Run: [SunJavaUpdateSched] C:\Program Files\Java\j2re1.4.2_01\bin\jusched.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: [ATIPTA] C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe
O4 - HKLM..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKCU..\Run: [AIM] C:\Program Files\AIM\aim.exe -cnetwait.odl
O4 - Startup: PowerReg Scheduler.exe
O4 - Global Startup: InterVideo WinCinema Manager.lnk = C:\Program Files\InterVideo\Common\Bin\WinCinemaMgr.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: &Google Search - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsearch.html
O8 - Extra context menu item: Backward &Links - res://C:\Program Files\Google\GoogleToolbar1.dll/cmbacklinks.html
O8 - Extra context menu item: Cac&hed Snapshot of Page - res://C:\Program Files\Google\GoogleToolbar1.dll/cmcache.html
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Si&milar Pages - res://C:\Program Files\Google\GoogleToolbar1.dll/cmsimilar.html
O8 - Extra context menu item: Translate into English - res://C:\Program Files\Google\GoogleToolbar1.dll/cmtrans.html
O9 - Extra ‘Tools’ menuitem: Sun Java Console (HKLM)
O9 - Extra button: AIM (HKLM)
O9 - Extra button: Related (HKLM)
O9 - Extra ‘Tools’ menuitem: Show &Related Links (HKLM)
O16 - DPF: {00000000-CDDC-0704-0B53-2C8830E9FAEC} (IELoaderCtl Class) - http://install.global-netcom.de/ieloader.cab
O16 - DPF: {166B1BCA-3F9C-11CF-8075-444553540000} (Shockwave ActiveX Control) - http://download.macromedia.com/pub/shockwave/cabs/director/swdir.cab
O16 - DPF: {3E68E405-C6DE-49FF-83AE-41EE9F4C36CE} (Office Update Installation Engine) - http://office.microsoft.com/officeupdate/content/opuc.cab
O16 - DPF: {56336BCB-3D8A-11D6-A00B-0050DA18DE71} (RdxIE Class) - http://207.188.7.150/0642e5bee8eb0ff6a106/netzip/RdxIE601.cab
O16 - DPF: {62475759-9E84-458E-A1AB-5D2C442ADFDE} - http://a1540.g.akamai.net/7/1540/52/20030530/qtinstall.info.apple.com/abarth/us/win/QuickTimeInstaller.exe
O16 - DPF: {9CF28A69-7659-4C51-BFD5-9ADE19E19EC3} (RegConfig Class) - http://download.yahoo.com/dl/installs/bkm/prod/yregcfg.cab
O16 - DPF: {9F1C11AA-197B-4942-BA54-47A8489BB47F} (Update Class) - http://v4.windowsupdate.microsoft.com/CAB/x86/unicode/iuctl.CAB?37956.0703472222
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab
O17 - HKLM\System\CCS\Services\Tcpip..{57F83B31-4A82-4AB7-A10A-8FE126632530}: NameServer = 206.13.28.12 206.13.29.12
O17 - HKLM\System\CS1\Services\Tcpip..{57F83B31-4A82-4AB7-A10A-8FE126632530}: NameServer = 206.13.28.12 206.13.29.12

what should i do next?