Very strange experience today with Windows 8.1 Preview. I lost the option to access my “C” drive. On first go, I was prompted to switch to Sky drive for documents and photos, and obviously I said “Don’t ask again” and boom, the crash of task bar. Then I selected a shortcut link to one of my favorite folders and I can access folder structure like, my downloads, my documents but not the “C” drive root. Very strange, I just hope it’s a fixable issue as, this will really be annoying to work with if I keep running into the “Windows Explorer” crash cycle.