And then just reset your computer to restore all of them.
This will restart all the programs that you closed that launch automatically when windows starts up.
It's really odd that you're having this problem.
Another idea would be to create a new user in Windows and try running Universe Sandbox there, or if this is a shared computer try logging in (with their permission) someone else's account and run Universe Sandbox from there.
Another thought:
What's the make and model of your keyboard?