Not sure what Windows OS you are using, but if it is XP, goto Start > Run, type in msconfig and click OK. (For clarity, that is MSCONFIG).

In the new window goto the Startup tab and search for any entry for this "Ascentive Registry Repair Program". If it is there, remove the tick.

If this is Vista or Win 7 you may have to use Start > Search to find Run.

Mark