Hi,
If you have Windows installation disc, you could boot your Windows PC from it, then format the boot partition or use DiskPart command to format. You could refer to these detailed steps:
1. Boot from disc.
2. Select a language to install, click Next.
3. Press Install Now at the next window, the program will ask you that where do you want to install Windows, choose C drive and click Format to initialize the system drive.
Or you can also press Shift+F10 key combination to open DiskPartat the Windows Setup screen, then follow the below commands to do this boot partition format:
Select disk n (the n represents the disk number listed that you want to format)
Clean (this command will delete all the data on the selected disk)
Create partition primary
Format FS=NTFS
Assign letter X: (the X: is the drive letter for system/boot partition)
After that, you will fix the problem “format is not allowed on the current boot” securely.
Please remember to mark the replies as answers if they help.
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