Game App does not recognize Direct x9 - despite it is available

Hi guys,


I am trying for days now to get Dragon Age Origins Ultimate Edition and Assassines Creed 1 running on my PC. DA:O needs DirectX9 and AC1 provides two executables one for DX9 one for DX10, both are not working.


The behavious is the same: Steam tries to load the game, a few seconds after that nothing happens anymore and there are no game processes running. Also there is no error message shown.


Windows 10 event monitor states an application crash within AC1 DX9 / D10 exe, respectively. For Dragon Age Origins the crashing part is the "DAOriginsConfig.exe", which is supposed to configure the game automatically depending on the PC Specs.


I tried almost everything, from running in Compatibility modes for Win XP SP3 and Win 7 which worked like a charm in the past on my old machine, to reinstalling Direct X9 via directx_june2010_redist.exe or the webhelper, uninstalling physX and installing PhysX Legacy driver, editing the game .ini file with minimal interfering settings ... but nothing helps. I also disabled Windows Defender the only anti virus tool I am using, which didnt change anything of the behavious described above. And I also checked Direct Play beeing enabled within Windows Legacy Functions list. It wasnt enabled in the first place, but after activation, there also was no change of the behaviour...


And now I am running out of ideas. :


I am using Windows 10 Pro, x64 Build 18362.778 1903/May 2019 Update. So since Steam usually installs ever driver the particular game needs, I rarely had problems playing the games. Nevertheless I checked the DirectX files and to me, they are where there supposed to be and as they supposed to be.


I am new in this forum, so I dont know how to upload files, so if my DXDiag is needed, please let me know.


My system specs are a bit overpowered for the above mentioned games, but in my eyes this cannot be that big of a deal, right?


AMD Ryzen 9 3950x

Nvidia RTX 2080TI

32 GB DDR4 3200 MHz RAM

Aorus Ultra x570 Wifi