Hi there. First up I would go & have an on-line scan from here http://housecall.antivirus.com/ .
Then download a program called 'HijackThis' & unzip it into it's own folder in My Documents, or somewhere. Not a temporary one or it cannot create backups. Start HJT & scan your computer. DO NOT FIX ANYTHING YET, most of the stuff there is necessary. When the scan is finished the scan button will change to a save button. Save the log to a text file, copy & post it back here.
Get HijackThis here. http://www.zerosrealm.com/downloads/hjt.zip
no prob crunchie i found what it is though .. its a Trojan horse that takes advantage of a vulnerability in Microsoft Internet Explorer to download and execute arbitrary code on the system.... so a virus scan and removal should take care of this also this definition is is spybot SaD ( look below ) and Adaware 6.0...
%Windir% is a variable. The Trojan locates the Windows installation folder (by default, this is C:\Windows or C:\Winnt) and saves the file to that location.
%System% is a variable. The Trojan locates the System folder and saves the file to that location. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
%Temp% is a variable. The Trojan locates the temporary folder and saves the file to that location. By default, this is C:\Windows\TEMP (Windows 95/98/Me), or C:\WINNT\Temp (Windows NT/2000), or C:\Document and Settings\<UserName>\Local Settings\Temp (Windows XP).