This is the steam-for-linux repo. You will likely never have any feedback here for your Windows 7 install. Even if you are streaming the game to a Linux computer, the issue resides on the Windows side of it and thus doesn't belong here.
That aside.... It's a known issue.
https://support.steampowered.com/kb_article.php?ref=3629-RIAV-1617#knownissues
11th bullet (second under the Windows section).
Closing due to it being both known and invalid for this issue tracker.
aticfx32.dllx1 2014-06
One of my old games, Starship Titanic needs to be run with UAC for compatibility reasons, when I try and stream this with Home Stream, it fails to launch and times out, and also killing Home Stream I think.