I'm having trouble booting into Windows after installing Lubuntu on my system. During the installation process, the setup warned me that my EFI partition was only 100MB, but I ignored it and now I can't access Windows at all—I can only boot into Lubuntu. Is there a way to repair or recover my Windows 11 installation?
3 Answers
To resolve this, you'll need to create a Windows 11 bootable USB. Using a tool like Ventoy makes it easier. It's possible to fix this without doing a full reinstall, but it's more complicated and there's no guarantee it'll work without issues.
Just to clarify, are you saying that Lubuntu is the only OS showing up, or do you see Windows in the boot menu? Sometimes Windows is still there but not listed in GRUB. Double-check your BIOS settings to see if Windows is an option to boot from there.
You can create a Windows install USB to fix the issue. I recommend using dedicated drives for each OS to avoid messing up the EFI partition. Just grab a Windows install media, boot from it, and you should be able to repair your Windows installation.
But how do I perform manual partitioning during the installation?
I found a way to create a Windows bootable USB from Linux! Just format the USB to NTFS, download the Windows image, mount it, and copy its contents to the USB. After that, restart and set the USB as your primary boot option.
Yes, there is a boot option for Windows, but it leads to a BSOD, indicating that the Windows Startup Repair is failed. It's clearly an EFI issue due to the partition being overwritten.