Clean Up Your PC's Registry

Your registry can build up unneccessary entries over time from the adding/removing of programs and files. I would recommend using CC Cleaner if you want to use a free, good registry cleaner. If you use CC Cleaner, all you need to do is open the program, click the "issues" tab on the left, click "Scan for Issues", and then click "Fix Selected Issues". You may want to make a backup of your registry to be safe.

Defrag Your Hard Drive
Run a Virus Scan