Everything goes Pink and Black

Hi,
Im having this problem…

http://img251.imageshack.us/img251/6276/rpevocity2v2p0005.jpg

http://img522.imageshack.us/img522/4648/rpevocity2v2p0003.jpg

This happens randomly, 1 second its fine, the next its like this. I have to restart to fix it, which is a huge fucking pain in the ass

My Specs…
Windows Vista Home Premium
Service Pack 2
AMD Athlon 64 X2 Dual Core Processor 5200+ 2.60 GHz
32-bit Operating System
ATI Radeon 4850 HD
(didnt know if i needed them just a precaution)
Thanks!

Ooh. I dont know what to say, other than you may want to try reinstalling Gmod.

That typically means that a texture somewhere is missing. Happens to me when I try to load CSS content.

that probably has nothing to do with it, its fine then randomly it does this

I had this EXACT same problem, on gm_wireconstruct_rc and i couldnt read the chat, couldnt see the menu, couldnt see ANYTHING. I was like WHAT THE FUCK NO! and got all pissed cause it did this. Would like to know why it did it though.

well i did delete local content and i havent had the problem yet so thats probably what you should do it doesnt delete your files btw

I blame Vista. But thats just me.

Try renaming your Gmod folder. Any missing textures, it always fixes it for me.