Fresh Install of the game ona new computer won't start

I tried to run it in windowed mode with no borders an tried reinstalling the VC pckages as well as DX9 to no avail …

Has the computer installed all of its Windows Updates?

Restart your computer and try again.

Also post your system specs.

Yes it has all the latest updates i uavr no issue with any other game on steam feom latest to oldest … tried half life 2 and it is working fine … tries sekiro, modern warfare etc… all is fine unistalled the game put on the ssd still nothing works

Here is a thread with a fix for the game not starting.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.