Plutonium

Pistakilla Downloaded the game then redownloaded plutonium and the error message still popped up

I posted about this earlier and I feel like I did not give enough clarification. I just redownloaded plutonium after not playing for a while. I'd say around a year or so. Every time I try to open the launcher I get this error code. I have NEVER pirated Black ops 2 as I bought it on steam over a YEAR ago. I have screenshot proof of me owning the game on steam and I can stream my whole steam library if need be to show that I bought the full game. I just want to know why I am getting this error.

I went to download plutonium and when I clicked to run as administrator, I got this error code and I do not know how to fix it.