Seeing Purple

I ran this game on my laptop and had absolutely no problems but only my PC i keep seeing purple on objects that aren’t supposed to be purple. At first I thought it was just that exit sign in the beginning but it’s everywhere. I have everything on max settings, I tried running it in direct x 9 and 9.8 and I even uninstalled it, redownloaded it and reinstalled it. Can someone help me out?

AMD FX™-8320 Eight-Core Processor
Radeon 260x
8 gigs of Ram

PS: I tried to take a screenshot of it using F12 but it looks fine in the screen shot. So I tried to print screen it but it just pasted a dark screen into Paint. So then I tried to get smart and turn it into a window and print screen it but apparently it’s not a problem in windowed mode, just full screen.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.