[vorlon24]

The thing with computers is that whatever you do to them can normally be undone (unless you are prone to throwing them out of windows, etc (excuse the pun!)).

All I would suggest is ensure you have backups of everything that you want to keep (this should be done periodically anyway, in case of failure), and I don't just mean the usual word and excel files, but also emails. I use Outlook, so can export the whole thing to a .pst file. I have yet to master Outlook Express. I prefer Outlook as you get a little more protection with the latest versions (it blocks .exe and various other file types - to help with preventing viruses from hitting your inbox)

So yes, take backups and then play!