...from EVERYTHING.

Completely bizarre, I know, but I've tested it a few times and the same thing happens: the wi-fi network becomes inaccessible for all devices in the house as long as Divine Divinity is running.

It will drop connection, and constantly disappears and reappears when trying to connect to it. Attempting to reconnect on iOS results in repeatedly asking for the password, and Windows just gives up after a few seconds.

As soon as I close the game, I can reconnect with no problems. Tried restarting the router while the game was on and that did not fix it either.

I did try searching for this problem but it seems like I'm the only one having it?

Game was purchased on Steam.
Running Win 7 32-bit
Router is a Billion 7800NL, in case that helps.
Dxdiag is here

The game itself runs perfectly so far.

It's not really a huge problem (presumably if I disconnect first it'll be okay), but it is really weird and I'd like to know if anyone can figure it out.