Startup Guard – Protect your computer from unwanted software Free, easy to use tool to allow only selected programs to run on Windows startup. Specify approved applications, close unwanted or find more about unknown apps. Startup Guard catches new startup records, so you can even remove a virus or spyware. Disable unwanted system processes to get maximum computer performance. Don’t worry that you can make a mess-up! Startup Guard includes a handy UNDO function to roll back any changes you made. Free for Windows XP and Vista.