unsobigf.inf is a little file I wrote. The “default install” for the file is to delete the two Sobig.f files from your Windows directory and remove the two startup commands from the registry. It will not delete the files if they’re currently in use. Run taskmgr and look for a process named winppr32.exe. Click on that process, then click the End Process button to shut the virus down. Save the file, right-click on it, and choose Install. As long as you stopped the program, the virus should be completely removed from your system. If you didn’t stop the program, the .inf should at least remove the startup commands from the registry. After rebooting, the virus shouldn’t run automatically. This will allow the .inf to remove the files that were running before.