Error Doctor check your computer and repair errors if it needs. It's newest Software, necessary for being on the computer.
When computer comes from factory all settings were optimized to work properly and fast. Over time you, like anybody else, add files and Software, remove files or uninstall programs you don't need any more, get FREE DOWNLOADS from Internet. Often FREE downloads comes with errors and even viruses, and spies, yes. Statistics say that 93.7% of personal computers have corrupt and potentially dangerous files. I can say the same, this is true. Unseen spies devour your Internet traffic and became your work slower.
Error Doctor 2008 can fix hidden bugs and errors on your PC, clean up System Registry and increase the overall performance speed of your computer. I confirm this too.
Error Doctor 2008 Auto Scans the registry for all types of errors. Automatic Scan is recommended for 'non-technical' users. After the scan will be completed, you will see a full list of errors with details, and you will decide fix individual invalid entries or all invalid entries of a certain type. 
Error Doctor 2008 has an option to create a backup file(s) that can be used to undo the changes before scanning your registry for errors.     
Error Doctor 2008 can be scheduled to scan the registry for errors every 5 minutes, 10 minutes, and 15 minutes or whenever you prefer. You even have the option to have your PC automatically scan for errors when your computer starts.
Now every computer should have such Software and until too late better go here Error Doctor and then decide what is important for you and for your computer.