I couldn't figure out why the acad.exe process is hanging in memory, but I can't see the program window!! I used Task manager -> Wait chain traversal (WCT) to identify the program that is interfering with startup. And this program turned out to be The Bat! WTF?!?! Windows 11 22H2, The Bat! 10.3.3.3 screenshot
To reproduce this problem, you must restart the system and run the Acad.exe file. After that, the Acad.exe process will be in the Task manager, but there will be no visible AutoCAD window. Then run Wait chain traversal and see that AutoCAD is waiting for TheBat.exe process. If I kill the AutoCAD process and start it again, the window will now appear. But with each new reboot, this will be repeated anew.
It is even easier to track the problem by running not the autocad itself, but dwg documents. If TheBat is running at the same time, then there is a very long wait, about 1 minute, before the AutoCAD window opens. As soon as I close TheBat, the dwg documents open normally without any delay (opening/closing a dwg document means opening/closing the AutoCAD window as well). As soon as I start TheBat, the problem with opening dwg documents immediately returns.