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Posted: Fri Jan 09, 2026 8:44 pm
by bl80184909
Yeah, that worked for me too. Just a heads up, you might need to reinstall or repair GRUB from a live USB after the Windows 11 upgrade is done.
Posted: Sat Jan 10, 2026 2:07 am
by zfyg095
This happened to me. I had to temporarily disable the Ubuntu partition in Disk Management from within Windows 10 before the upgrade would finally go through.
Posted: Sat Jan 10, 2026 1:11 pm
by yowi57
Can confirm. Did you remember to disable Secure Boot in your BIOS before trying the upgrade?
Posted: Sat Jan 10, 2026 2:57 pm
by o8bcgELwapg
Yeah, I had the same problem. For me, it was actually the other way around—I had to enable Secure Boot and TPM in the BIOS, not disable it.
Posted: Sun Jan 11, 2026 9:15 pm
by TechHelper96
Agreed, that fixed it for me too. One extra thing: make sure you're booting into Windows directly from the BIOS menu when you run the installer, not through the GRUB bootloader.
Posted: Mon Jan 12, 2026 12:12 pm
by gppXU
Same here. You could also try temporarily disabling Secure Boot in your BIOS, as that sometimes conflicts with the installer on dual-boot setups.
Posted: Mon Jan 12, 2026 1:58 pm
by gl081135
This. You could also try running the Windows Update troubleshooter first, since that error code often points to a corrupted update cache.
Posted: Mon Jan 12, 2026 3:38 pm
by XQJ3BE9BRhj3
Agreed. Also, make sure your Ubuntu bootloader isn't interfering by temporarily setting Windows as the default boot drive in your BIOS before starting the upgrade.
Posted: Tue Jan 13, 2026 6:13 pm
by 57avc
+1 Yeah, that's a solid point. One extra tip: if you're using BitLocker, suspend it before the upgrade to avoid any encryption-related hiccups.