Fix black screen error for Win 8

Step 1: Click the Control Panel on the Desktop screen (or you can open it in Start Menu)Step 2: Click Hardware and Sound
Step 3: On Hardware and Sound window, in Power Option section, click Choose the Power button
Step 4: Click Change settings that are currently unavailable
Step 5: Continue to click Turn on fast startup (recommend) below to deselect and save changes, and then restart the computer.
From : betdownload.com