Steam stopped starting

When I had the same problem, I reinstalled Steam.

Nurg
I reinstalled did not help (there are no viruses on the PC)

install in another folder, before installing, clean the computer ccleaner

Try to issue a ticket for Steam Saporta, they will help you solve this or that problem with Steam within 2-3 days. http://forums.steampowered.com/forums/showthread.php?t=3080700 If no one way helps

I remember, too, the steam did not start, I just deleted it in the steam folder itself

LodedDormoUse It
is unlikely, but still, make sure that all the folders in which Steam is installed are in English (so that the path to Steam itself goes through folders with English names).

Nurg
Already figured out recently. But thanks anyway for the advice