Hi there, This little script will assume that you uninstalled BOINC through Add/Remove Programs, before you start using it. The script won't do that for you and will throw weird errors when you neglect to uninstall first. The script will delete all your BOINC directories & left-over registry entries that the normal BOINC uninstaller will not clean up. Use only if you want to rid your system completely of BOINC. This batch file will work on Windows 2000 and above only. It will not work on Windows 9x/ME What it does? 1. Uninstall the BOINC user accounts and groups. 2. Use the Windows 2003 Server Tool NTRights.exe to delete the User Rights Assignments. 3. Kills boinctray.exe if it is still running. 4. Read the BOINC Install directory and Data directory paths from the registry and subsequently delete both directories and all files and sub-directories included. 5. Finds and deletes the BOINC_Master directory or directories in the Documents and Settings directory (works on foreign language Windows as well, where the "Documents and Settings" directory is set in that language) 6. Delete all BOINC related keys from the registry. How to use? To use it, unpack the contents of the zip file somewhere convenient, like C:\Clean\ Then click the Windows Start button->Run, type in cmd and click OK. In the command line window that opens, type: c: (press Enter) cd\clean (press Enter) cleaner (press Enter) This starts the "cleaner.bat" batch file. If all is well, it should go from there fully automatically. When the batch file ends, you can close the command line window (if it's still open) and delete the temporary directory holding these files. Then you will need to reboot your computer to finalize the process of cleaning. With thanks for using BOINC. We're sorry to see you go.