And in my attempt to get all my files sorted out and not have them scattered about the multiple HDD's, I found a single file that is about 75 Mb and a text file with an Activation Key and that is it. I have been doing some house cleaning sort of on my PC that has been updated some since then.

As stated in the Subject line, How can I go about finding out if the Activation Key that I have is valid, I ask this because a Coworker that I worked with years ago had given me a couple of CD's with apps / programs on them back in late 2011 and mid 2012 or thereabouts.