Try this Crespo click here
You need the registry optimiser version.
There is not a lot of difference between the trial version and the full paid version,only that the trial version repairs 10 errors at once,where as the full version repairs all errors with one click.
This program has many useful tools for keeping your system tidy.
Also adding these would be a good bet also.
Spybot search and Destroy
Most of these can be found at click here
Using regurarly with updates will serve your needs perfectly.
I assume you have an AV and Firewall installed.
If not,AVG or Avast AV both free versions works well with Zonealarm firewall also free version.
Hope these suggestions help you.