You got any of these annoying errors with Built-in Administrator account on Windows 8?
This app can't open
can't be opened using the Built-in Administrator account. Sign in with a different account and try again.
Here is the solution:
1. Local Security Policy - Run "secpol.msc" and modify as in screenshot
2. Edit Registry - Run "regedit" and change the value as in screenshot
3. Reboot your System and now you can run all metro Apps as Administrator.