Originally Posted by
LuffyDLuffy
f your using steam and want to Disable steam from updating your CD Key. (If you've used the CD Key Changer.)
1. Goto start and search 'regedit'
2. Navigate to, HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Bohemia Interactive Studio\Arma 2 OA
3. Right click the folder go to 'Permissions'
4. Click on advanced
5. Go to administrators and click edit
6. Find 'Set Value' and check the box 'deny' and accept changes
Next time you run arma 2 through steam the CD Key will not update.
I use this method.