May error yan kasi baka may mali sa process ng steps mo
TS, ano bang gusto mong idual boot? Anong OS?
Anong app ginamit mo para maka dual boot?
Recommended ko kung mag dual boot. Isa os windows, yung pangalawa os nmn linux based.
Check mo tong mga apps na to.
1. Grub2Win = Grub2Win is completely free and open source. Safely multiboot Windows and Linux systems on both GPT and MBR disks. Works with both EFI and BIOS firmware.
2. EasyBCD = supercharges your Windows PC, allowing you to dual-boot to your heart's content.
3. rEFInd Boot Manger
4. Clover EFI bootloader
Google/youtube mo na lang pano sila gamitin.
Good luck!