Garry's Mod 10 keeps installing my other Source Games

I know there is another thread of this kind here, but either I fail at searching or it’s too difficult to find.

Whenever I have a Source Game (Like Day of Defeat: Source) uninstalled, and I start up Garry’s Mod 10, it forces an Install of it.

I tested this before by uninstalling ALL other games than Gmod 10, and I start it up, it takes like an hour to load, and when I check my Game List, their all installed again.

My Hard Drive is freaking out over this too, are there any solutions?
Thanks.

Gmod 10 requires another source game to operate.

Yeah I know, thanks for the reply.

I have Team Fortress 2 installed, as well as the Source SDK Base (and Orange Box) installed.

Unmount them then.

Hi im having that same problem and its creating data that i have to keep deleting. Did it ever get resolved?