I'm currently using windows xp home edition. I've been using it for quite some time and now it's getting quite slow especially when startup. I would like to get rid of the unecessary windows files in c:/windows but I've no idea what file to delete.

I've cleared all the junk programmes but that is still not enough. How can I optimize the performance of my PC.

I'm going to fix my registry but don't know which Registry cleaner is better to choose.

My PC slow down, I've scanned it several times with different antiviruses – nothing. So I think thats all because of registry errors.