Installed Windows 8.1 Preview and Windows will not start after reboot. Get screen saying "Preparing Automatic Repair," followed by a screen saying "Diagnosing Your PC," followed by a screen title "Automatic Repair" which tells me that my PC did not start correctly and suggesting that I either press "Restart" or "Advanced Options." The problem is that the Advanced Options require me to enter my Administrator password which, for the life of me, I cannot remember. What do I do now???
Windows won't start and I can't use any of the repair options or System Restore since I can't access any of those options without my Administrator password.