Hi,

I made a bit of a mess while trying to set up a dual-boot system, and now I’m trying to clean everything up without doing a full reinstall.

I have a UEFI laptop with a single NVMe SSD. Windows 11 Pro is installed on it as the main system (C: drive). I installed Linux Mint alongside Windows to dual-boot using GRUB.

Afterwards, I removed the Linux partitions from Windows Disk Management, but things didn’t go as planned.

Now I’m dealing with three issues:

1. GRUB still shows at startup

Even though Linux is gone, the GRUB boot menu still appears when I turn on the laptop. It doesn’t work anymore since the Linux partitions were deleted. I want to completely remove GRUB and restore Windows Boot Manager so it boots straight into Windows.

2. Unallocated Linux space can’t be merged into C:

I tried deleting the Linux partitions and extending my C: drive, but I couldn’t properly merge the free space back into C:. It looks like something is blocking the extension.

3. Disk was converted from Basic to Dynamic

During troubleshooting in Disk Management, I accidentally converted the disk from Basic to Dynamic. Now I’m not sure how this affects partitioning or whether I can safely revert it without wiping everything.

I’d like to avoid a clean install if possible.
What would be the safest way to:

• Remove GRUB completely and restore Windows bootloader (UEFI)
• Merge the unallocated space back into C:
• Convert the disk back to Basic without data loss (if possible)

Any help or step-by-step advice would be really appreciated.

I made a mess and need some help fixing it.

I have a UEFI notebook with a single NVMe SSD. Windows 11 Pro is installed on it as the main system on the C: drive.

I installed Linux Mint alongside Windows to set up a dual-boot system using GRUB, so I could choose between Windows and Linux at startup.

Later, I deleted the Linux partitions from inside Windows Disk Management, intending to reclaim that space and merge it back into the C: drive. That part didn’t work as expected.

Now I’m stuck with a couple of issues:

1. The GRUB bootloader still appears when I turn on the laptop, even though Linux is gone. I just want to completely remove GRUB and restore Windows Boot Manager so it boots directly into Windows again.
2. I also tried to reclaim the Linux partitions and merge that space back into my C: drive, but I couldn’t figure out how to properly extend or reattach it in Windows Disk Management.

How can I fully remove GRUB and restore the Windows bootloader on a UEFI system, and also correctly merge the deleted Linux space back into my C: drive?

+1:

While trying to fix things in Disk Management, I accidentally converted my disk from Basic to Dynamic.

Is there any way to convert it back to Basic without using paid third-party software?

Thanks in advance!