PLEASE RUN THE GAME AS AN ADMINISTRATOR
Please make sure that you use “Run as Administrator” to install and to start the game (right-click on the shortcut or setup file and select “Run as Administrator”).
PLEASE DISABLE ADDITIONAL INPUT DEVICES
Please disconnect all input devices (controllers, graphics tablets, etc.) except the keyboard and mouse? If you are using x360CE, vJoy, or other virtual input devices, please disconnect/disable them.
DISABLE MOUSE ACCELERATION
Try disabling the Enhance pointer precision option. To do this, please follow these steps:
Press WinKey+R, and in the Run window type:
After that, press OK, and navigate to Mouse -> Pointer Options, then make sure that Enhance pointer precision is unchecked, and click OK.
Windows 8.1, 7:
Start -> Control Panel -> Mouse -> Pointer Options, then make sure that Enhance pointer precision is unchecked, and click OK.
PLEASE DISABLE TOUCHSCREEN
If you are working on a tablet PC, please connect the keyboard and mouse and temporarily disable the touchscreen.
PLEASE RUN THE GAME IN CLEAN BOOT MODE:
Please make sure that no third-party applications are interfering with the game. Please try to install and run the game in “clean boot mode.” Instructions on how to do that can be found here:
Make sure to use an account with Administrator privileges.