al616

You have alot of stuff running. Why do you have both IE & Firefox running at the same time ? Also I see you have some torrent stuff. And some things I've no idea what but I'm not big on Dell so some of the stuff may be close to normal for it.

But first of all you note it ran fine for a'while. Did it start running slow say after a boot up or was it slow in coming ? Did you install something & notice it started to act up ? Make sure you have your latest video driver installed. What's your memory usage via Task Manager after a boot up but before you start running apps ? If you know what "msconfig" does you may want to take a look at it & do a what's-needed-to-run-Windows & see if that helps. Also have you tried running via "safe mode" to see if that has any affect ?

Fwiw...those "registry cleaners" can do more harm than good.