Error 0xc000007b with Oracle 19c
I had exactly the same errors after installing a 32-Bit client (19.9.0.0.201020). Windows application event log stated an error concerning &quot;C:\Windows\system32\ntdll.dll&quot;. This is a 64-Bit DLL with the 32-Bit counterpart in &quot;C:\Windows\SysWow64&quot;.
This is the solution
You need to add C:\Windows\SysWow64 to the PATH environment variable. This can be done temporarily using:
SET PATH=%PATH%;C:\Windows\SysWow64 

Furthermore you need to have 32-Bit Microsoft Visual C++ Runtime 2015-2019 installed. The latest Visual C++ Redistributable can be downloaded from:

The latest supported Visual C++ downloads (Microsoft | Support)

Hope this helps.