Garrysmod crashes before main-menu

Whenever I start gmod it crashes during the loading on the blue progress bar that comes before the menu comes up. I think it’s crashing on a step called “autherizing with steam” or something like that(It only shows up for a second before hl2.exe crashes).

I’ve tried running the game with -dxlevel 80 and -dxlevel 91

[editline]11:36PM[/editline]

Cleaning gmod(renaming the garrysmod folder where addons/maps/etc are kept so a new one is generated) does nothing for me.

[editline]11:37PM[/editline]

It sometimes crashes on other steps as well

[editline]11:43PM[/editline]

Details spit out by Windows 7


Problem signature:
  Problem Event Name:    APPCRASH
  Application Name:    hl2.exe
  Application Version:    0.0.0.0
  Application Timestamp:    470c11ae
  Fault Module Name:    StackHash_0a9e
  Fault Module Version:    0.0.0.0
  Fault Module Timestamp:    00000000
  Exception Code:    c0000005
  Exception Offset:    00010a89
  OS Version:    6.1.7600.2.0.0.256.48
  Locale ID:    1033
  Additional Information 1:    0a9e
  Additional Information 2:    0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:    0a9e
  Additional Information 4:    0a9e372d3b4ad19135b953a78882e789

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