bought off steam file too short addons/characters.pbo

[hazzamck 10]

just baught and downloaded arma off steam and every time i try to run i get

data file too short addons/characters.pbo

ive looked around and alot of the ansers to the problem relate to people that have bought a hard copy atm im redownloading it ive tryed deleting the files but that didnt help could someone please give me a hand

[empa 10]

Got any antivirus /firewall that could possibly intrefeer?

[hazzamck 10]

actually i dont pretty sure i dont i need to download one soon tho long story but atm i dont have antivirus software on my computer