Missing Textures on Windows and Lights

Whenever I load into a game i get the missing texture pink and black squares on the windows and sometimes light FX
Screenshot:

http://cloud-4.steampowered.com/ugc/39725256753535474/18636DCD1C4183B447AC3347BEE077B2350425BD/

please help, thanks

do you have css/ep1/ep2?

yes i do
ill try redownloading them just incase i guess