Other things you can do:
→ Buy Norton 360
(on sale for a limited time: 20% off! Includes antivirus & data backup features on top of performance tuneup capabilities)
IMPORTANT: this product replaces Norton SystemWorks Basic Edition, Norton SystemWorks Standard Edition and Norton SystemWorks Premier Edition.
If you are looking for Norton Disk Doctor and/or Norton WinDoctor, this is also the product to get.