Windows 8.1 Alt/Tab in Games

Hi all

I'm having an issue with Windows 8.1 that I have had issues with resolving. What happens is I load a game, any game, and the operating system seems to Alt+Tab to the desktop without my instruction after about 10 minutes of gameplay. What I've done to check:
  • Checked the keyboard. All the keys are working fine and responsive/non-clogged.
  • Checked background programs. I've started windows with no background programs running and it still has this problem.
I'm unsure the cause of this problem, but the above has not resolved the issue which has been bugging me for about 2 months now. The programs I have in the start up are:
Asus DG Audio Center
Mad Catz R.A.T mouse Utility
Intel Rapid Storage Technology
Roccat Isku Utility
Nvidia GeForce Experience
VmWare Workstation
Zotac Firestorm

Is there anything I can do to check the cause of this issue?

Many thanks

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