Man, wife and I got identical pc's ~3 years ago. I did the free update on mine awhile back, but not all my drivers were supported yet, so I reverted. Got around to reinstalling it a couple months back and no more driver issues. Wife last week asks if she should do her free upgrade since it ends this week and I say sure, I upgraded mine and had no problems. She set it up to run overnight and the fucking thing crashed for some unknown reason in the middle of swapping over and corrupted a bunch of windows files, including windows system recovery. Go to windows to make a boot cd, enter the windows key on the pc and windows says they can't give it to you because it was pre-installed by the manufacturer. Man, what the fuck does it matter if it was pre-installed, it is a legit version of windows is it not? Fuck!
So yeah, free windows 10 upgrade causing us to format the pc and making it difficult to do so.