Odd problem, sage install and runs just fine on a new terminal server (windows 2022) build, installed using both change user /install or via control panel add app, same result. Once installed and before activation you can open, update and run a sample company file. Activation while in sage works, with a success message followed immediately by a "bad key file" error. Activation with sage closed same success message but not bad key file error.

Try to open sage post activation it flashes' and that's it, wont' open.

Originally thought it was a bad DOT NET install, and checked/repaired that with no success, once I activated with sage open it popped the bad key file error.

Antivirus shows no sign of interference or blocking 

I'm at a loss as to why  - any help would be appreciated.