l4d running help

when I tried running l4d it said it could not load library client how do I fix that problem

This is Garry’s Mod


although this is garrys mod section.

i had that error ages ago.

possible solutions that i came across.

  1. change your operating system to windows vista or windows 7
  2. run in administrator mode.
    3.delete a certain file causing the problem
  3. wait till steam fix the steam cloud client and syncing program.

if that dont work i dont know what will
except uninstalling an reinstalling.