PC Problem

[AirDOG]

Heya guys,i have a problem,so,now a week ago i reinstalled my windows,i used the same windows before,i formated my pc and now,i installed freelancer,downloaded the discoveryfl 4.86 patch and installed it. After that when i started fl he made an uptade,update 5 of 4.86 version,now when i enter in game and i wanna play i get a verry big lag and when i try to jump with my ship in Jump Gates my pc get's this error message on blue screen:

A problem has been detected and Windows has been shut down to prevent damage to your computer...
Technical information:

*** STOP: 0x0000007F (0x00000008, 0x80042000, 0x00000000, 0x00000000)

blah blah...
And then i must restart my pc,when i enter again in game,i find my ship somewhere farr away from the jump gate in the system where i jumped to,can anyone help me to fix this problem? When i enter in fl my CPU works at 100% and the pc goes crazy,i have 1.5 Gb RAM and 1.6 Processor,256 Mb video card.
If anyone can,please help me!
Before the update and before i changed the windows,it wasn't provlem with fl.