Hi, I updated all drivers and followed all tips provided in previous topics. Still the game constantly crashes >90% of the time when I am starting / loading a new game. DxDiag is attached - thanks for your advise.
32-bit OS it's your problem. On 32-bit Windows game only able to use 2GB RAM by default, so your crash most likely related to this limit. Check this topic for more info: https://forums.uberent.com/threads/crashing-on-32-bit-windows-heres-a-guide-to-help.51990/ Actually you just need to upgrade your Windows 7 to 64-bit.
thanks for your advise, I followed all the instructions to increase the usable RAM. Positively the game will not crash all the time any more. Nevertheless the game will still crash one it uses more than 2.800 MB RAM. Maybe any additional advise to fix that? I tried several times and around 2.800 seems always to be the critical number. It is no problem to use more than 4.000 MB (overall) together with other applications though. Only the 2.800 is critical.
No, you can't do anything else other than upgrade to 64-bit OS. Also I want notice that as long as I know you don't need to pay extra for 64-bit OS and your product key for Windows 7 should as well work fine for 64-bit version with same edition. But you probably might check for more information at Microsoft support.