How to mark partition as inactive

Open up a command prompt.

  1. Type DISKPART
  2. Type LIST DISK
  3. Type SELECT DISK 1 (where 1 is the number of the hard drive you need to change)
  4. Type LIST PARTITION
  5. Type SELECT PARTITION 2 (where 2 is the number of the active partition you wish to make inactive)
  6. Type INACTIVE
  7. Type EXIT to exit DISKPART
  8. Type EXIT again to exit the command prompt

Reboot