[CRASH] Entire computer crashes when trying to matchmake

So yesterday I tried to play 5v5. It became my turn to ban and, without warning or apparent reason, the computer froze up and the music turned into this repetitive buzzing noise. I was unable to figure out a way around it and was forced to restart.

Today I decided to try again, figuring that it was maybe a one-off issue, and once again the moment it became my turn to ban my computer freaked out in an identical manner.

I'm wondering if anyone else had had this issue and figured out a way to fix it, or if anyone knows possible causes for the bug.

I'm unsure how to reproduce the issue.