I was able to play arma for about a day after getting rid of daemon tools and alchohol.then i got the same 5024 error again.I saw in another thread ,someone saying that securom does'nt like sysinternals programs.I realised i had just run "sysinternals process explorer to shut down some programs.
It seems that every time i run it i get the securom error 5024.I just reeboot and dont use it and i can start arma.I even reinstalled Daemon tools and arma runs.