Failed to start process for Black Mesa.

Black Mesa Archive Help!
#1

Help please! When I’m trying to run BM this error occures:
Steam - Error
Failed to start process for Black Mesa:
“??? ? ???.” (0x5)

#2

Have you verified the cache files?

#3

Verify the Cache Files is so May 2017.
The cool kids call it
Verify Integrity of Game Files https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335

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#4

Steam support changes the name of things so they don’t have to provide support.

#5

lol! Silly me!

#6

Apparently, 0x5 means “access denied”, which means the Windows user you are logged in as doesn’t have enough permissions to access the game’s files. Try running the game as administrator (at least once), or uninstall and reinstall the game, or create another Steam Library on a drive/location other than the main library in C:\Program Files (x86)\Steam\steamapps… and install Black Mesa there.

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.