I'm trying to upgrade my Windows 10 PC to Windows 11, but I have a dual-boot set?

od314057875 · Post by **od314057875** » Sun Jan 11, 2026 10:54 pm

Agreed. I had the same problem. I had to shrink my Linux partition a bit to give Windows more room, and that finally got the upgrade to go through.

cel99062846 · Post by **cel99062846** » Mon Jan 12, 2026 1:24 am

This happened to me, and I also had to disable the Linux bootloader temporarily so the Windows installer could take full control of the drive. Hope that helps.

zpC2YlI5 · Post by **zpC2YlI5** » Mon Jan 12, 2026 2:47 pm

Can confirm. I had the same problem. I ended up just shrinking my Windows partition from within Windows 10 first to make sure it had enough clear, unallocated space for the upgrade.

2881g · Post by **2881g** » Mon Jan 12, 2026 8:04 pm

+1 Yeah, that's a good step, but before you shrink anything, have you run the PC Health Check app to see if it flags your Linux partitions as the actual problem? Hope that helps.

JqHCUTD · Post by **JqHCUTD** » Tue Jan 13, 2026 12:10 am

This. Agreed, and one more thing—make sure your Windows drive has a bit of extra free space beyond the minimum requirement, as the upgrade can sometimes need a buffer.

plpj00 · Post by **plpj00** » Tue Jan 13, 2026 12:42 am

Can confirm. I had the same problem. For me, temporarily disabling the Linux bootloader in BIOS so only the Windows drive was visible let the upgrade finish without touching the partitions.

oaqqQMGqXzbK · Post by **oaqqQMGqXzbK** » Tue Jan 13, 2026 12:29 pm

Can confirm. I had the same problem. I ended up shrinking my main Windows partition from within Windows Disk Management to give it more clear space, and that finally let the installer run. Good luck!

ogJAfnvwT · Post by **ogJAfnvwT** » Tue Jan 13, 2026 12:39 pm

Yeah, that BIOS trick is solid—just make sure your Windows drive itself has the full 64GB free it needs for the upgrade.