Most of the programs don't consume too much of your computer's resources, however, there are some, such as Adobe Photoshop, which do. The first thing you need to do is to identify them and then close the demanding ones.
If you are a Mac OS user, you can easily identify them via the Activity Monitor (access it by going to Applications -> Utilities -> Activity Monitor) in the CPU column. The higher the percentage, the more of the CPU is used.
Check out the don't know how to close (quit) programs/applications solutions to learn how to close the programs.
If you don’t receive the email in the next 2 minutes please check your junk folder, and add [email protected] to your safe sender list.