Windows 8.1 Textures Bug

Everytime in every Map in CF I play I get texture bugs on the map and for my weapon. why?
Could you help me?

64-bit
4 GB RAM
AMD Turion(tm) Dual Core M500 2.20 GHz

Screenshot of that what I mean

http://www.pic-upload.de/view-26432989/txt-error.png.html