since I update the VGA driver with windowsupdate, the programs which use directdraw startet with error of failure in 3D rendering.
Testing with DXDIAG shows, that DirectDraw and Direct3D is no longer present.
Enabeling is not possible.
I found the solution.
We use on this Workstation the remote software pcvisit.
In use it disables in some circumstances the directdraw and direct3d function.
Deleting all file and registryentries of this software helped !!!
If you need any further assistance in regard to your concern, please let me know.
I will be waiting for your answer, or if your matter has been solved, do not hesitate to confirm.
I am looking forward to hearing from you.