DayZ/ArmA gone,seriously? "NOT installd ?"

[Makasuto 0]

hello guys,

i have the problem that myArmA/DayZ is faulty!???

Playing DayZ now almost since release,yesterday i was playing then i stopd and leave my house(PC 0ff)

few hours later i come back and tried to play..nothing.

so i thought lets install new beta patch..and there it starts,it says

ArmA2 OA is NOT installed on your Computer,or is faulty!

Then i started Dayz COmmander,and he says no DayZ/ArmA is installd?

maybe someone can help?

thx

(i have nothing NEW installd or any other things)