I've been considering using a registry cleaner as well. I found this one: Wise Registry Cleaner Free - Free software downloads and software reviews - CNET Download.com The wise registry cleaner free looks like a good one. Cnet seems to be really reliable and this cleaner was high on their list. The only downside is that it requires you download the ask toolbar when you agree to the user agreement. Anyway, i haven't tried it yet because my computer is still running well. If you decide to try it, let me know how it works out.