MDB or MS Access database file can be corrupted at any point of time due to numerous factors which have ability to corrupt critical data. A corrupt .mdb file can’t be accessed anymore, hence it becomes useless. But if have a valid and regular backup for that .mdb file then we can easily restore it from that backup. But if not then three things can be done to deal with this situation:
Try to import the data of corrupt .mdb into a new database file. And see if it gets opened or not.
Use Compact and Repair Utility for MS Access database. It is absolutely free but sometimes it does not work with heavy corruption. But still it is mostly recommended.
If both above solutions don’t work, that point of time a file repair application provided by various software companies would be the best answer.
MDB file repair fixes the heavy corruption from .mdb files and makes them reusable in just no time. This application is very safe and highly effective.