Intruders can attack your computer by exploiting software vulnerabilities, so the fewer software programs you have installed, the fewer avenues there are for potential attack. Review the software installed on your computer. If you don’t know what a software program does, research the program to determine whether or not the program is necessary. Remove any software you feel isn’t necessary after confirming it’s safe to remove. Back up important files and data before removing unnecessary software to prevent accidentally removing programs that turn out to be essential to your OS.