Am I all set for a reformat?

Hey everyone. I plan on doing a reformat, but before I get started with that, I am going to put everything I want on to an external hard drive for later retrieval.
(The reason I am doing this is because my computer is getting really slow with loading files, the registry is a mess even though I use CCleaner, Defrag, and virus softwares like norton, malwarebytes.. etc.. and my computer is 7 years old now…)
After I got all my songs, pictures, movies, and whatever else on my external hard drive, I am going to reformat. My computer came with the following CD’s

-Microsoft Works Suite 2003 (Disc 1-5)
-APPLICATION For Reinstalling Dell Tools System Software
-APPLICATION For Installing/Reinstalling Roxio Easy CD Creator 5.2 Basic
-Drivers And Utilities Dell Dimension Resource CD (Contains drives, diagnostics and utilities and computer documentation.)
-OPERATING SYSTEM Reinstallation CD for XP Home Edition SP 1.
-Sound Blaster Live!
-Norton Antivirus
Ahh thanks for reminding me to backup favorites!