Windows 8 Problems

Hello, Im new to the forums.
Recently i updated my computer to Windows 8 and before everything was working fine.
However, today after trying to run the following games/applications they all showed up in the Task Manager and said it was running in the background, however, nothing was appearing on my computer screen.
-Minecraft
-ToonTown
-Steam
If anybody knows how to fix this or can tell me whats wrong i will be much appreciative.
-Paul