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GRUB Repair Guide
Add Missing Windows 11 Entry (Tested on Debian 12 + Windows 11 UEFI systems)
Basic Fix (90% Success Rate)
sudo apt install os-prober sudo update-grub
Manual GRUB Entry (For NVMe Drivers)
a. Identify Windows EFI Partition
sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINTEdit this page