So i made this for all users, who have Windows 7 or Vista and playing WarRock. If appears black screen, when you open the game, just follow this tutorial:
STEP 1:
Right click to WarRock launcher and click on Troubleshoot compatibility.
STEP 2:
Select "Troubleshoot program".
STEP 3:
Check these boxes: "The program opens but doesn't display correctly" and "The program requires additional permissions", then click Next button.
STEP 4:
Check only this box: "Window controls appear cut off, or the program changes visual themes when started" and click Next.
STEP 5:
Click on Start the program and then on Next button.
STEP 6:
At the end, click on Save this settings for this program.
READ:
If this doesn't helped you, try to reinstall WarRock and download some programs like GameBooster, and update DirectX and drivers for your graphic card.
If you think you have virus on computer just run Ccleaner .