Steam install issue - keep being told "invalid install path" but only for Homeworld

As the title really.

Tried successfully to install two other games to the same folder… there’s over a terabyte free but no luck with Homeworld.

Have tried turning off the firewall, the virus protection and the malware protection… but nothing seems to have helped

I have also encountered the same issue, all my steam games are installed to the D: directory. I solved the issue by launching Steam as administrator, as it for some reason only had read privileges when attempting to install Homeworld. Might be a recent steam update causing issues too.

kristofferav is right!

I had to run steam as an Admin and it started to preloaded & install just fine.