I deleted the two files mentioned in this question : http://social.answers.microsoft.com/Forums/en-US/w7security/thread/ce791275-9572-4305-8902-098a706c32e1
Upon realising my mistake, I tried to move them back out of the recycle bin to replace the files Windows had created as a replacement, but the new files were listed as "in use" by System and I can't do that. So I coped them back as 7B296FB0-376B-497e-B012-9C450E1B7327-5P-0 (2) and 7B296FB0-376B-497e-B012-9C450E1B7327-5P-1 (2).
My problem is the same as the previous asker's. Windows told me upon restart that I need to verify the legitimacy of my operating system, and that I can either download software to do so or re-enter my product's registration and activation keys. The problem is that I don't have these anymore -- my mother threw away the packaging for my netbook, in which I stored my installation and setup booklet which contained the keys, and both numbers on the sticker on the back of my netbook have worn off. I need to be able to restore the original files. Can someone help me do this?