I backed up my registry before I went playing in it and the long and short of it I made a mess so I right click on the .reg file in my documents and click merge and get a pop-up which says Windows cannot find '...registry copy.reg'. Make sure you type the name correctly, and then try again.
So I'm thinking it's because I changed the name of the .reg file right? So short of re-installing Windows is there anything else I can do? And will re-installing the OS even help?