Steam games won't install!

I put this in here because it’s happening with Garry’s mod too but every single game I try to install (new computer) just says “download starting” and never starts. Someone, please help! Sorry I put it in the Garry’s Mod discussion on accident.

I usually press Launch Game, then it starts downloading and opens a window on Update Status. And shows how long is left.

http://filesmelt.com/downloader/DAAAANGIT.jpg

What? GRRAH.

http://www.fotosearch.com/bthumb/PHT/PHT611/PAA111000015.jpg

The server you tried to download it from is too busy. If it keeps doing that over and over, go into Steam Settings and choose a different server