Hi Guys, I have a fresh install of Windows 8 Pro on a new PC and have done for some weeks. On Friday i hit the shutdown option Update and Restart. On the Saturday (yesterday) I turned on my machine to greeted with the Windows 8 Logo then a blank screen and doesn't boot at all into Windows (And not i have checked both monitors and they connected fine. What was i doing just BEFORE "Update and Restart"....... 1. Enabled UEFI on the BIOS 2. Installed the Hyper-V Windows 8 Features 3. Created and installed a Virtual Switch 4. Created and installed a Virtual Machine and installed Windows 8. 5. Onto the VM i installed Visual Studio 2012 Web (MVC4) and SQL Server Express 2012 (NOT LocalDb) Then after than i ran the Windows Update on the main PC and pressed "Update and Restart". What have I tried doing to resolve this issue? Booted (F12) using the OEM Disc. I have then Repair your computer->Troubleshoot.... 1.1 Advanced Options 1.2 Automatic Repair 1.3 This fails and I get the following error: http://sdrv.ms/UyNy59 then i tried.... 2.1 Refresh PC 2.2 I get the following error: "The Drive where Windows is installed is locked. Unlock the drive and try again" then i tried.... 3.1 Reset PC 3.2 I get the following error: "Unable to reset your PC. A required drive partition is missing" then i tried.... 4.1 System Restore 4.2 This fails and i get the following error: http://sdrv.ms/UyO9nq So I'm completely at a loss. I presume if I unlock the primary disk I should be able to boot or at least repair? Anyway i really don't want to wipe and uninstall if possible.