[How to] Make Partition Active or Inactive Using DISKPART

The system will boot from the partition only if it has the Active flag set.

To make partition Active:

1. Run Command Prompt as Administrator
2. Type

   diskpart

3. Type

   list disk

   Remember the desired disk number
   
   

4. Type

   select disk #

   where # is the desired disk number
   
   

5. Type

   list partition

   Remember the desired partition number
   
   

6. Type

   select partition #

   where # is the desired partition number
   
   

7. Type

   active

---

To remove Active flag

1. Run Command Prompt as Administrator
2. Type

   diskpart

3. Type

   list disk

   Remember the desired disk number
   
   

4. Type

   select disk #

   where # is the desired disk number
   
   

5. Type

   list partition

   Remember the desired partition number
   
   

6. Type

   select partition #

   where # is the desired partition number
   
   

7. Type

   inactive