In this article I will outline my experiences with an in-place upgrade of my corporate Windows 7 x64 Ultimate machine to that of Windows 8 Release Preview (RP). Granted this is a release preview and not the RTM (Release to Manufacturing), but most of the underlying bits should remain the same in the end in a few months. I have a large range of software installed on this test machine, which should be useful for compatibility testing. I've included a compatibility chart to organize my findings. In addition, this setup is a multi-monitor setup of 4 screens over the two video cards to make things more interesting. This is a work in progress, as I will likely update this article over time.