Running Windows 7 Professional x64 obtained through MSDNAA
I'm having a similar issue I went to event viewer and I have about 6 instances of a windows explorer crash... quite unfortunate to say the least. Didn't they have this problem in the beta? I did try a couple of the fixes that others used for the beta but to no avail.
I actually reinstalled the OS two times I did a clean install each time. It seems like everytime I run the Steam game client and I'm working with windows explorer it will crash for some reason.
Tell me what information you need from the event viewer I really want to get this squared away as Win 7 is much quicker than Vista and I would hate to go back to it.