Beta variant Open the registry (Start, Run, regedit) and delete the following keys: HKEY LOCAL MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\FSW HKEY LOCAL MACHINE\System\CurrentControlSet\Control\Shutdown\SetupProgramRan HKEY CLASSES ROOT\CLSID\{20A03A4C-9FAF-45D5-A5C2-B6C49774E03C} HKEY CLASSES ROOT\CLSID\{99B0B113-6F25-49C9-8ECF-2FDDD3EDFF6A} HKEY CLASSES ROOT\FSW beta1.Application HKEY CLASSES ROOT\Fswinst.Application Reboot Windows and delete the 'FSW' folder inside 'Program Files'. You can also remove a leftover installer file from a DOS command prompt window (Start->Programs->Accessories): cd "%WinDir%\Downloaded Program Files" del fswinst.ocx v5 variant Open the registry (Start, Run, regedit) and delete the following keys: HKEY LOCAL MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\FSW HKEY CLASSES ROOT\CLSID\{47CC4DCD-BBC9-47A3-A677-44DB2559E0D8} HKEY CLASSES ROOT\CLSID\{5DD7B3BE-FDEC-4563-B038-FF80F2345B89} HKEY CLASSES ROOT\FSW.Application HKEY CLASSES ROOT\FSWINST.FswinstCtrl.1 Reboot Windows and delete the 'FSW' folder inside 'Program Files', along with the files 'support.exe' and 'IdleUI.dll' in the System folder (inside 'Windows', called 'System32' under Windows NT/2000/XP). You can also remove a leftover installer file from a DOS command prompt window (Start->Programs->Accessories): cd "%WinDir%\Downloaded Program Files" del fswinst.ocx Finally, go to Internet Options and reset your home page. v6 variant The v6 variant (Free Scratch Cards) uses random eight-letter filenames in the System folder (in 'Windows', called 'System32' under Windows NT/2000/XP). Find the key HKEY LOCAL MACHINE\Software\Microsoft\Windows\CurrentVersion\Run and delete the random-looking eight-letter value pointing to a similarly named EXE in the System folder. (eg. bprplgqf). This should Restart the computer and open the System folder. Delete the file with the same name as you saw in the Run registry entry along with 'fsc.ini'. There should be some other eight-letter random files you can delete to clean up if you like: An EXE whose internal name (right-click, choose 'Properties' and click the 'Version' tab then choose 'Internal name') is 'loader'. An EXE with a dollar icon, internal name 'FSC'. A DLL, internal name 'runpool'. A 7K-long EXE with no version information. (Check the dates, don't delete a file if you're not sure.) Make sure you have removed lop as well; unfortunately this means more random filename finding.