I am getting this error while starting the BizTalk Server Application Service in services.msc.
Cannot start the Biztalk service Biztalk Group: BiztalkServerApplication service on local computer.
Error 14001: This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem.
The 14001 error appears to be a generic error when a windows service fails to start (according to Google at least).
I would suggest you try the following:
Create a new host instance through the BizTalk Admin Console and attempt to start that – i.e. try and isolate the problem to a specific windows service/Biztalk host instance
Re-install – not the best option I know, but you should be able to resolve this with a repair of your runtime (this won’t affect your databases).