HL2 Doesn't load after DM was installed

[daverince]

Like the title suggests, HL2 is a no-no-a-go-go. I get this message when it loads up:

Failed to load the launcher DLL:

The specified procedure could not be found.

Any suggestions? I'm clueless.

Incidentally, DM works.

[Shippi]

Yeah, I have the exact same problem :(

[daverince]

Bummer eh?

Well, at least you know it's Valve at not you or I. I'm sure it'll get sorted. I'll report my problem to Valve, and you should do the same. Let me know if you find any solutions elsewhere.

Cheers,

Dave