In order to provide C2 level government security, the environment surrounding the system must meet the same level of security that Windows provides. The C2 standard requires physical security, such as locking the computer.
To protect your system from any type of virus infection in Windows and possibly recover the boot sector of the hard drive, use one of the following methods:
- Remove any floppy disk in drive A after you shut down Windows.
- Configure the system BIOS to disable floppy disk booting (no floppy seek) or change the order of the boot process to hard drive first.
- Configure the system BIOS to enable system password protection.
- To fix the boot sector, start the computer with a MS-DOS system disk and run the following command:fdisk /mbrWARNING: If your hard drive was prepared by a third-party disk manager program, such as Ontrack Disk Manager, then the fdisk /mbr command removes the overlay program of that third-party disk manager, such as the Overlay Manager, and the drive no longer starts. Therefore, you must make sure that the drive was not partitioned with a third-party disk manager program before you use this command.
- Run the Repair utility to verify and recover Windows startup files.
If a virus has infected the Master Boot Record (MBR), you cannot run the Emergency Repair Disk until the virus is cleaned. Most virus programs have the same limitation as DOS so you cannot run a scan against the hard disk drive; however, DOS 6.22 Msav.exe will clean the MBR and RAM of the computer.