Edit: Potentially solved. Reinstalled/updated Nvidia Experience. Will be playing again to see if the issue occurs again.
Edit 2: Nvidia reinstall seems to have worked. Played 5-6 games of League with Alt Tabbing and no issues. Marking thread as solved.

Issue: While playing League of Legends, if I Alt Tab while the game is loading, it causes me to get the BSOD. This doesn't seem to happen every time and I'm not really sure what's causing it. There doesn't seem to be a specific time during loading that it does it. Side Note: Computer was built only a little more than a month ago, no other issues have popped up but this.

Exact situation: Champion loading screen up in League of Legends. Alt Tab to use Firefox or Chrome or Skype. Blue screen of death.

OS: Windows 7

Build:

PCPartPicker part list / Price breakdown by merchant / Benchmarks