Hello all, im new to the thread but a veteran to the series.

So i have a problem close this what the original poster said. It is a recurring problem.
I will use the most recent save game as my example. OK, so im on patrol heading to my destination, on the way i bag 13 ships, i saved the game about ever 20 minutes, well i leave and come back the next day and when i load my save game i get the shaky screen(But no alarms) and im surfaced, and then 5 seconds into the game the mission ends and says U-boat abandon carrer, crew is all alive, uboat is 100% and im on the surface. I tried to exit the mission before it this happens but then the carrer just ends! This is a new campain. Here are my Specs,
HP
AMD Phenom 9500 Quad-Core Processor 2.20GHz
Nvidia GeForce 8500GT
3.00GB Ram
Dual 360GB Hard Drives
Windows Vista Home premium 32bit SP3