Try uninstalling Tools from under Safe Mode
To get to Safe Mode click "Start VM" and IMMIDIATELY start pushing F8 or function+F8 key
You will have a menu and select "Safe Mode"
Uninstall tools, reboot, install Tools
To enter Safe Mode you need to press F8 (Func+F8) pretty fast, due to system loads faster than a common PC. If you see the "Windows is loading" screen with a picture, it means you've skipped the Menu - stop VM and try again.
To get to Safe Mode click "Start VM" and IMMIDIATELY start pushing F8 or function+F8 key
You will have a menu and select "Safe Mode"
Uninstall tools, reboot, install Tools
To enter Safe Mode you need to press F8 (Func+F8) pretty fast, due to system loads faster than a common PC. If you see the "Windows is loading" screen with a picture, it means you've skipped the Menu - stop VM and try again.