installing 32-bit windows: diskpart convert mbr error
You have to remove all partitions. This a limitation of Windows’ disk management.
After that, you can use convert mbr
. But since you have to remove all partitions anyway, clean
is much faster and removes the partitioning scheme, too.
And yes, this is the exact error message you’ll get on a non-empty disk:
DISKPART> list partition
Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 Reserved 32 MB 17 KB
Partition 2 Primary 2014 MB 32 MB
DISKPART> convert mbr
Virtual Disk Service error:
The specified disk is not convertible. CDROMs and DVDs
are examples of disks that are not convertable.
On the other hand, if the disk is empty:
DISKPART> list partition
There are no partitions on this disk to show.
DISKPART> convert mbr
DiskPart successfully converted the selected disk to MBR format.
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minusatwelfth
Updated on September 18, 2022Comments
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minusatwelfth almost 2 years
I have an efi-based 64 bit system with win 8 pre-installed. I want to downgrade to 32-bit win 7 and so I booted up a bootable win 7 usb and opened command-prompt with shift+f10. I used convert mbr command on disk 0 (which should be gpt) and it says: "the specified disk is not convertible. cdroms and dvds are examples of disks that are not convertible"
Now, I have not cleaned the disk yet, so this might explain the error. However, I would think a different error message would appear if that were the case and I don't want a laptop without an os. Furthermore, I cannot enter "Repair your computer" as it said system recovery options was incompatible. What is going on here? i definitely want to convert to mbr for other reasons too.