Does Vista have a utility to clean|fix the regisrty ?

If not is there a good freeware version ?

Looking into a issue with Vist locking up/freezing from time to time.
It lasts 1-2 min, and nothing will work, not even alt-ctrl-del

I don't think its spyware etc, as I've cleaned it up.

Anyhow, some said it might be regisrty related.