Shut down and unplug the computer. Remove the CPU case lid. Locate the various fans, and then use compressed air to blow dirt out through the internal slits from inside the case.
✔ cleaning the fan

Save files to an external storage device to aid in file recovery.
✔ backup

This process allows you to permanently delete files you no longer need.
✔ cleaning out unneeded files

This mini program may be an unwanted application.
✔ widget

Remove programs you accidentally downloaded when you purchased an e-book.
✔ removing unwanted applications

This application scans, locates, and makes needed repairs on the hard drive.
✔ checking the hard drive for errors

I DID THIS CAUSE TI COULDNT FIND THE ANSWERS SO I WANTED TO HELP ANYONE WHO NEEDS THIS