Getting Steam error on start up of cs:Source -HELP!

[youppi]

Exact error msg:

Steam.exe (main exception): Win32 StructuredException at 77E76338: Attempt to read from virtual address 70477005 without approriate access rights.

cant open any game in steam, only started after the recent update

 

[warcrow]

Steam website...

 

[warcrow]

...still need more help?

 

[youppi]

that wasnt my problem, thats a different error, but i tired that. nothing. i reinstalled steam and source and the same error occured.