copy the following lines to a notepad window and save as "killer.bat" (or any other name) and save it on the desktop and run it. or otherwise, open a command window "start menu->run->cmd" and paste the lines to it
:)
Good luck removing the virus
If you are not able to copy the following contents, you can get the same from the link (i've put it there as a backup) - on mediafire also http://www.mediafire.com/?6wswkghxb1pi2c3
taskkill /f /im pw.exe /im MSASCui.exe
reg delete HKEY_CURRENT_USER\Software\Classes\pezfile /f
reg delete HKEY_CLASSES_ROOT\pezfile /f
reg delete HKEY_CURRENT_USER\Software\Classes\.exe /f
reg delete HKEY_CURRENT_USER\Software\Classes\pezfile /f
reg delete HKEY_CLASSES_ROOT\.exe\shell /f
reg delete HKEY_CLASSES_ROOT\pezfile /f
reg add HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\FIREFOX.EXE\shell\open\command "C:\Program Files\Mozilla Firefox\firefox.exe" /f
reg add HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\FIREFOX.EXE\shell\safemode\command "\"C:\Program Files\Mozilla Firefox\firefox.exe\" -safe-mode" /f
reg add HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\IEXPLORE.EXE\shell\open\command "C:\Program Files\Internet Explorer\iexplore.exe" /f
reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center" /v AntiVirusOverride /f
reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\Svc" /v AntiVirusOverride /f
reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center" /v FirewallOverride /f
reg delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\Svc" /v FirewallOverride /f
del /f %UserProfile%\Local Settings\Application Data\pw.exe
del /f %UserProfile%\Local Settings\Application Data\MSASCui.exe
del /f %UserProfile%\AppData\Local\pw.exe
del /f %UserProfile%\AppData\Local\MSASCui.exe