NONE of my games work anymore. Each of them pop up with a specific error message. Dota 2 comes up with 'failed to load the launcher DLL: invalid access to memory'. MTG says 'MTG failed to start (error code: 66)'
Those are just the ones I've reinstalled, can't be bothered reinstalling all the other ones since they'll just give me the same message. I've tried verifying cache, I've tried reinstalling steam as well as the individual games. I've tried contacting steam helpdesk over a week ago and still no reply.
If i load the games from their location, MTG works, but dota 2 stops at the load screen and gets stuck with 'connecting to dota 2 network...'.
This is quite ridiculous, I've paid for lots of games, and now i can't play them. The least that Steam can do is get back to me on the tech support. Getting quite fed up. Anyone got any ideas on how to fix this?