Upgrading from Windows 8 ProWMC on a Dell Studio 1535 laptop. It ran for a couple of hours and was in the 'a few more things' stage when it decided to fail and roll everything back. Now that it's back where I started, where do I start looking to try to find out what happened? I'm hoping it put some log files somewhere. My first guess is that it's third-party drivers, will start by looking at those. There are several things which are old but still were working with Windows 8; I suppose one or more of these might not be compatible?