» Mon Jun 04, 2012 3:11 am
Not to spam, but saw this on the pinned forum.
http://www.gamesas.com/topic/1258133-installing-from-disc-instead-of-steam/
If you are seeing the error, "This game is currently unavailable. Please try again at another time," there is a simple way to fix it.
1. Close Steam. Right click on its icon in the System Tray, and Exit.
2. Go to Steam's folder. C:\Program Files (x86)\Steam
3. Find the file ClientRegistry.blob and rename it or delete it.
4. Start Steam again. It will re-download the client.
5. You're fixed. Have fun.
BLAMO!