Dusting your Dell laptop's surface, keyboard, fan, etc., using a duster or vacuum cleaner regularly can assist in eliminating built-up grime and dust. If your computer is sluggish or having problems, wipe away temporary files and cookies via Windows Update or by following these steps: Click Start, search "run," type temp and %temp%, and then delete all of these files. Another way is to execute windows+r, type "temp," select all, and delete.