Can you not do a recovery from the recovery partition?
To access the System Restore, Refresh and Reset options using the F12 option at startup, perform the following:
If not already, ensure the computer is completely shut down. How To: Shut Down a Laptop with Windows 8
Now restart the computer by pressing the power button - IMMEDIATELY start tapping the F12 key on the keyboard until the "Boot Menu" screen appears.
Using the arrow keys, select <HDD Recovery> and press "Enter".
On the next screen you are asked to confirm if you want to contiue with recovery. Select "Yes".
The computer will bring you to the Advanced startup screen.
Select Troubleshoot. Under Troubleshoot you will see “Refresh” and “Reset”.
Select “Advanced options.” Located here is "System Restore."