I have owned crysis 2 since it has came out, but I reinstalled it and lost my CD key. I recently bought it again from origin and every time I play the campaign only, it freeze about a half hour later of playing. This did not happen when I was playing it the first time. The only difference is that I have windows 8.1 pro now and I am playing it on origin instead of just downloading it off my CD. If there is anyone who knows how to fix this or if it is just a problem with origin that would help.

(Operating System: Windows 8.1 Pro
Processor: AMD Athlon II X2 220 Processor 2.80 GHz
RAM: 4 GB
System type: 64-bit Operating System
Graphics Card: GeForce GTX 460)