Crashing

http://dumps.garrysmod.com/?view=855018266
http://dumps.garrysmod.com/?view=147662012

NULL_CLASS_PTR_DEREFERENCE_c0000005_vphysics.dll

I have reinstalled Garrys Mod a total of 3 times, and I have also reformatted.
This has been persisting for 3 weeks or more now, someone please help. I have tried everything.