Some people may be experiencing their AOS not starting after applying the CU12 kernel update.
Exception code: 0xe0434352
Faulting application path: C:\Program Files\Microsoft Dynamics AX\60\Server\MicrosoftDynamicsAx\Bin\Ax32Serv.exe Faulting module path: C:\Windows\system32\KERNELBASE.dll
The exception code refers to a .NET runtime exception. You should find that installing .NET framework 4.6 will resolve this issue. The installer does not check this as a prerequisite.
.net Framework 4.6 web installer is available here: