A quick search of the 'net shows that CPU at 3.5GHz, should certainly be fast enough for most uses. How much RAM is installed makes a difference in processing, also using 2 or 4 matched modules allows for dual-channel which can help. Since the computer seems powerful enough a couple of things may help, one is use Task Manager to see what is running [click more link at bottom left] and the other is you may want to consider a clean install, reinstall or system reset at some point. Be sure you have the install discs/files for programs you installed after getting the computer and save/backup any files/data you have created.