Faron
You need to know the differences about mbr2gpt.exe and DiskPart. The mbr2gpt.exe is meant to convert your live boot drive without wiping data. While DiskPart’s convert gpt requires a completely empty, raw disk.
If DiskPart says “disk is not empty,” that’s normal. You cannot convert your system drive this way without deleting everything first.
For the validation fail on mbr2gpt:
Run it from WinPE, not /allowFullOS in normal Windows (that often fails)
Check for logical partitions, tiny partitions before C:, or too many primaries
What you can try:
Shrink C: a bit from the end
Delete the 500MB recovery partition (keep System Reserved)
Run /validate again
If still no luck and you’re fine with a clean wipe:
Boot from USB → Shift+F10 → DiskPart → clean + convert gpt → reinstall Windows. Won’t brick your motherboard, USB boot will be fine.
Clean nukes everything, so only do that if you already backed up.
