Since todays update in 2.06 RC Branch Arma3 exits immediatelly when trying to start it with the exit code
0xC0000139 - STATUS_ENTRYPOINT_NOT_FOUND
Previous version on 2.06 RC Brnach was working just fine.
Switched back to current stable version 2.04 and it started normally. Switched back to 2.06 RC branch and Arma exited with same error code. So it doesn't look like its caused by some kind of file corruption.
Same error with 32 and 64 bit version of Arma3.
Same error in current Arma3 development branch.
Noticed the profiling arma3client_x64_profiling_190_145454_v05.exe client in RC Branch and tried to start it, it aborted immediatelly with error
Fatal Error: Arma 3\x64\PhysX3_x64.dll