Start ur computer in safe mode with command prompt and type the followinf command to enable registry editor:-reg delete HKCU\software\microsoft\windows\currentversion\policies\system /v “DisableRegistryTools”and run HKLM\software\microsoft\windows\currentversion\policies\system /v “DisableRegistryTools”after this ur registry editor is enable type explorergo to run and type regeditthen follow the following path :-HKLM\Software\Microsoft\Windows\Currentversion\Runon the right side delete the entries which contain ‘Brontok’ and ‘Tok-‘ words.after that restart ur systemopen registry editor and follow the path to enable folder option in tools menuHKCU\Software\Microsoft\Windows\Currentversion\Policies\Explorer\ ‘NoFolderOption’delete this entry and restart ur computerand search *.exe files in all drives (search in hidden files also)remove all files which are display likes as folder icon.ur computer is completely free from virus brontok