I thought you might be interested in looking at O2 Compatibility with Windows 7 64 Bit.
https://forums.bohemia.net/forums/topic/81770-o2-compatibility-with-windows-7-64-bit/?do=findComment&comment=1613986
× 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.