I would not advise this program, personally.
Ad-Aware is much better, with a far more advanced definition base.
Just today, I was fixing a computer that had a worm on it.
After locating and deleting the worm, I scanned the users PC with Microsoft AntiSpyware. A few tracking cookies came up, and that was it.
<<>> I then scan the same PC with Ad-Aware and 100 critical objects are found, ten of which had installed themselves in the registry, too.
That is just my experience with the program so far.
Of course, try the program out for yourself and make your own opinions.
- Steven.