System reboots while playing HL2

[Kali]

Hi all,
I'm playing the map where you can drive the buggy on the beach. But than my system reboots. NO error, no message... it just reboots. Do you have any idea why ?

[MGSRevolver]

Same thing happened to me yesterday, as soon as I loaded a game (I'm still back in Ravenholm). I got the blue screen of death, and then my PC automatically restarted. I chose my previous save point, and it worked fine after that.

Hopefully, Valve will patch this and the sound errors soon...