As far as I am aware an ASUS recovery partition is accessed by tapping the F9 key when you see the ASUS logo on the screen.
Couple of suggestions if only to rule them out;
Try loading the optimized defaults.
A long shot but does sometimes work;
If you do not have a Windows 8 DVD or a system restore disk, connect a USB keyboard to the computer and then try the following for us;
1: Use the power button to restart your computer three times, this will hopefully start the Windows Recovery Environment.
2: In the Windows Recovery Environment, on the Choose an option screen, tap or click Troubleshoot.
3:Tap or click Start-up Settings.
4: If you can't see Start-up Settings, tap or click Advanced options, then tap or click Start-up Settings.
5: Tap or click Restart, then wait while your computer restarts.
6: On the Start-up Settings screen, choose Refresh
7: Sign in to your computer with a user account that has administrator rights.