I had a bunch of trouble with Win8. I turned off UAC, disabled Windows Defender. Make sure you are starting with a fresh hard drive - new partitions. Don't do the AMD update from Windows Update. I turned off Windows Update until I had all the drivers installed on the Windpad and it all sorted out. I also backed up the SSD using Acronis in case it locked me out again. Then I could just start from the backup rather than re-installing. Funnily enough after I had a backup it behaved itself and is now working just fine. Go figure Good luck!