It would help us if you could supply the model number of your dell computer or the Service Tag so we can get an idea of what your particular computer has...as far as hardware goes.
Also...you really don't want to blindly insert the recovery CD into your CD drive and click "Reinstall Windows", since this will copy Windows over your current installation...and may leave some damaged files behind...not fixing the problem.
If you're going to reinstall your operating system becuase you want a fresh start...it's best to reformat the hard drive and boot from the recovery CD in order to clean everything up and start anew.
Please note: Formatting your hard drive will erase everything on that drive...so you may want to backup any important files, programs, documents and folders prior to doing what I jyst recommended.