You can download and run Windows Live Safety Scanner, be sure to select FULL scan, it may take awhile to run. All errors (registry entries, open ports, etc.) will be displayed after the scan. It may even detect the problem in your previous post. Afterwards, if you choose to repair the items, it will create a restore point, then repair the items. It's a good starting point for those with computer performance related problems to diagnose and repair. And it's free, from Microsoft.