The California Department of Motor Vehicles says most of its 188 offices are offering full services following a catastrophic computer failure that crippled most of the department's operations.

The DMV said Thursday that 12 offices are still unable to process driver's license or vehicle registration matters. Another five can deal with driver's licenses but not registrations.

Computer struggles forced DMV customers around the state to wait out what officials have called a "perfect storm" of simultaneous hard-drive failures that crippled two thirds of field offices.

Officials say experts are working to repair the system and get office functions back online but they have not provided an estimate for completing the work. Online services remain functional.