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Dragonsire

Having trouble with Steam ArmA 2 and OA

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So my dad un installed steam for some reason and I just re-downloaded all my games. Then I get this when I run ArmA 2 and OA

Sorry!

An error was encountered while processing your request:

Missing or invalid form session key

Can some one help with this? I also get "bad serial given on setup"

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Start steam as admin

right click on steam.exe/properties/compatibiilty/ check start this program as admin

(permanent fix)

steam will display a message: "are u sure u want to do that", and u say yes

Edited by h3retic
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