Make a backup of your BF3 SP/kit profile.

[[MPGH]Disturbed]

After the Karkand patch, there has been issues with the profiles being corrupted. Multiplayer/co-op progress will not be lost, but your kit/weapon presets, SP progress, and control/visual/HUD settings can be wiped.

- Make a backup of your current BF3 "PROFILE SAVE DATA" file onto a USB drive or Cloud storage.
- If you get a corruption error message while starting up BF3, delete the "PROFILE SAVE DATA" you were using and replace it with the backup.

[Versa]

After the Karkand patch, there has been issues with the profiles being corrupted. Multiplayer/co-op progress will not be lost, but your kit/weapon presets, SP progress, and control/visual/HUD settings can be wiped.

- Make a backup of your current BF3 "PROFILE SAVE DATA" file onto a USB drive or Cloud storage.
- If you get a corruption error message while starting up BF3, delete the "PROFILE SAVE DATA" you were using and replace it with the backup.

Thank you for the information sir.