Random Tabbing-out?

[Sense of Right League]

Hey guys, got a problem that I'm hoping somebody else has had and figured out. My computer will sometimes tab out to the desktop in the middle of playing a game, whether it's Movie Battles 2 or Project Zomboid which are the two games I've been playing recently.

It may have been a coincidence but I've only started experiencing these tab-outs after installing TeamSpeak 3. I also am experiencing the same tab-outs in games on my work PC after installing TS3 on there. I'll be uninstalling TS3 on my work PC tomorrow and seeing if it fixes the issue so I can confirm that it is TS3 causing the issue.

I'm running on a 64-bit Windows 7 PC. Yes I have made sure it isn't just me accidentally hitting ALT and TAB together

Thank you!