Hello Schmoo,
There used to be an old program called McAfee Nuts & Bolts...It had several utilities, including a registry cleaning utility. Nuts & Bolts also had optimization utilities...but best of all, it is really cheap...since it is old, you can pick it up at Wal-Mart for like $8-10 dollars
It should do a pretty good job of optimizing and cleaning up that old PC
