Speaking of computer disasters, if you want to reboot your system into Safe Mode, you can’t just jam on the F8 key prior to Windows 8 loading: You have to first enable Safe Mode itself. Type “cmd” on your Metro UI, right-click on the Command Prompt app (called “cmd”), and select to run it as an administrator. Then type “bcdedit /enum /v” on the command prompt screen and hit Enter. Copy the entire “identifier” string (including the braces) for the entry that has “Windows 8 Consumer Preview” as the description, not “Windows Boot manager.”  Then, type the following into the command prompt: bcdedit /copy youridentifierstring /d “Windows Developer Preview (Safe Mode)” and hit Enter. After that, type in “msconfig” and hit enter.
Click on the “Boot” tab and select the entry called “Windows Developer Preview (Safe Mode).” Click on the “Safe Boot” option, the “Make All Boot Settings Permanent” option, click OK, and click “Yes.” Restart your system, and you’ll be given the option to launch either your normal Windows 8 environment or your new Safe Mode environment.