– must convert the disk to MBR so windows 7 will install and change bios settings
– on a dell – disable secure boot and and turn off UEFI (set to legacy) in bios then:
3. In the command prompt, type diskpart and press enter. (See screenshot above)
4. Type list disk and press enter.
NOTE: Make note of the disk number (ex: Disk 1) that you want to convert to a MBR disk.
5. Type select disk # and press enter.
NOTE: Substitute # with the actual disk number that you want to convert to a MBR disk. For example, select disk 1.
6. Do step 7 or 8 below for what you would like to do.
7. To Use the “Clean” Command to make Disk Unallocated
NOTE: This is the easiest method. It will wipe the disk clean all at once leaving it as unallocated space afterwards.
A) In the command prompt, type clean and press enter.
B) Go to step 9 below.
8. To Manually make Disk Unallocated
NOTE: This method has you manually delete each volume on the disk before converting the disk to MBR.
A) Type detail disk and press enter. If the disk does not have any volumes listed, then you can go to step 8Ebelow.
NOTE: This will give you a list of all the volume numbers on the selected disk number that you will need to delete in steps 8B and 8C below.
B) Type select volume # and press enter.
NOTE: Substitute # with a volume number listed in step 8A. For example, select volume 3.
C) Type delete volume and press enter.
D) Repeat steps 8B and 8C for each volume # listed in step 8A until you have deleted all volume #’s.
E) When finished, type select disk # and press enter.
NOTE: You would use the same one from step 5 above. For example, select disk 1.
F) Go to step 9 below.
9. Type convert mbr and press enter.
10. Close the command prompt.
11. You can now create partitions on the now MBR disk if you like.
NOTE: Restart the computer if you did step 2 instead.