NEITHER!! Go back is buggy, and system restore is a resource hog than can start stealing space off of your hd. THG did an article about it awhile back that you may want to check out: <A HREF="http://www4.tomshardware.com/consumer/00q3/000927/index.html" target="_new">http://www4.tomshardware.com/consumer/00q3/000927/index.html</A>
In my opinion, the only real way to fix a buggy installation is to reinstall!!
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Wherever you go, there you are.