Hi I have crysis 1 but when I finish the game in the caves and starts charging to "paradise lost" I get an error APPCRASH and I can not solve.
and defragment your Windows registry, corrected all the errors, but not fix. I hope I helped.

My laptop is:

Hard Drive 320 GB
RAM 4 GB DDR3
Video Card 2 GB
AMD Dual-Core P540 Turiom 2.40 ghz

https://www.youtube.com/watch?v=Gf-2DvOfa2U&feature=plcp