Use code: 8210-5904-1702-0616. Easy access to do the following: Clean Harddisk, Clean Startups, Check 4 errors, Defrag drives, check for software updates, and check space on hard drive. A couple of the button's no longer work on the second page of the program, as Yahoo has changed it's access codes recently. As I am winding down my business, I will not be readdressing these. The main buttons do work and will help you perform maintenance on your computer to keep it running smoothly. Everyone should be performing these minimal tasks on their home computers. Enterprise systems will normally control these tasks from a system admin position. When installing, you'll need to use the serial number: 8210-5904-1702-0616. This version is the first release on CNET Download.com.