Its your pc/internet.
Quad core system, with a 12Mbit internet connect?![]()
Then it can't be working as advertised if its just suddenly happened.
*exits Steam*
*clicks Steam*
Took roughly 30 seconds to come on with a fair few windows and stuff open. And as anyone whose played SupCom2 with me will tell you, this PC isn't exactly speedy.
Could just be its taking it too long to connect to Steam so if you can monitor net activity you could at least rule that out.
(ok a few seconds was an underestimate but i generally only run it on startup anyway)
just download the steam installer and repair steam.