The installer didn't create the corresponding registry key to the game's installation path. All you have to do is to open regedit, navigate to HKLM\Software\Bohemia Interactive Studio\Arma 2. Create a new string value here named "MAIN", double click it, and paste C:\Program Files (x86)\Bohemia Interactive\ArmA 2 into "value data". After doing this, you should be able to run the patch.
I get the same error after doing this. Please help me. I am using WinXP Pro
[Solved] Arma 2 - patch 1.07 Error [Solved] Cause is missing registry entry
in ARMA 2 & OA - TROUBLESHOOTING
Posted
I get the same error after doing this. Please help me. I am using WinXP Pro