Mine locks up periodically and I'm beginning to suspect it's when I'm on one of the twitter links provided by APS posters. Not sure, but started to maybe be aware of it, so we'll see.
I found every time I have to use Win 7's (yeah, yeah, I know) Restore function I have to reload it from my downloaded exe files.
My other browsers (Chrome, FIrefox) seem to pass right through the Restore process with no problem.
Otherwise, I'm pretty happy with it, although I don't get much involved with high level stuff. I don't do games, for example. I'm the fuddiest of duddies.