I thought you might be interested in looking at [Resolved] ARMA 2 OA is not installed on your computer or installation is corrupted.
https://forums.bohemia.net/forums/topic/113082-resolved-arma-2-oa-is-not-installed-on-your-computer-or-installation-is-corrupted/?do=findComment&comment=1873803
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.