The FSInfo section is part of the boot sector at the beginning of the drive.
If it's corrupt, as the message indicates, then it can be repaired - instructions from MS click here
If your system boots up normally at other times, it could indicate a fault on the hard drive in the area of the boot sector.
If repairing fails, or fails to last, then you will need to think about more drastic measures. For instance you could backup the entire drive, run a manufacturers diagnostic to check it thoroughly, and repartition/reformat and reinstall the backup.
Or at worst you might need a new drive. Errors on this part of the drive are particularly critical, as they can stop a drive functionng completely, rather than just be a bad part that can be locked out of use.