Im so noob. How can i install windows back ? Please help me there’s no windows option in efibootmgr
You’re not giving any information that would be help you. when you installed, which option did you use? ( install along side, replace partition, or erase disk).
what is the output of
lsblk -o NAME,FSTYPE,SIZE,PARTTYPENAME,MOUNTPOINT
im erasing my disk . And output of ```
lsblk -o NAME,FSTYPE,SIZE,PARTTYPENAME,MOUNTPOINT
``` NAME FSTYPE SIZE PARTTYPENAME MOUNTPOINT```
``` loop0 squashfs 164,8M /var/lib/snapd/snap/gnome-3-28-1804/161```
``` loop1 squashfs 82,9M /var/lib/snapd/snap/discord/132```
``` loop2 squashfs 55,5M /var/lib/snapd/snap/core18/2284```
``` loop3 squashfs 65,2M /var/lib/snapd/snap/gtk-common-themes/1519```
``` loop4 squashfs 43,6M /var/lib/snapd/snap/snapd/14978```
``` loop5 squashfs 4K /var/lib/snapd/snap/bare/5```
``` loop6 squashfs 110,8M /var/lib/snapd/snap/core/12725```
``` loop7 squashfs 109,1M /var/lib/snapd/snap/woe-usb/21```
``` loop8 udf 5,5G /media/woeusb_source_1647167153_33953```
``` sda 465,8G ```
``` ├─sda1 ntfs 345,9G Microsoft basic data /run/media/unenhuu/New Volume```
``` ├─sda2 vfat 100M EFI System```
``` ├─sda3 vfat 100M EFI System```
``` ├─sda4 vfat 100M EFI System```
``` ├─sda5 vfat 100M EFI System```
``` └─sda6 ext4 119,3G Linux filesystem /run/media/unenhuu/074bd73b-72a6-48ba-ac35-eabaa9a8a815```
``` sdb 14,5G```
``` ├─sdb1 ntfs 14,5G HPFS/NTFS/exFAT /media/woeusb_target_1647167153_33953```
``` └─sdb2 vfat 1M W95 FAT16 (LBA) ```
``` nvme0n1 238,5G ```
``` ├─nvme0n1p1 vfat 300M EFI System /boot/efi```
``` └─nvme0n1p2 ext4 238,2G Linux filesystem /```This forum is about Manjaro - not Windows - reinstalling windows is off-topic.
Check if /etc/default/grub has
GRUB_DISABLE_OS_PROBER=false
Then rebuild grub
sudo grub-mkconfig -o /boot/grub/grub.cfg
2 Likes
output is :
Generating grub configuration file …
Found theme: /usr/share/grub/themes/manjaro/theme.txt
Found linux image: /boot/vmlinuz-5.15-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.15-x86_64.img
Found initrd fallback image: /boot/initramfs-5.15-x86_64-fallback.img
Found linux image: /boot/vmlinuz-5.10-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.10-x86_64.img
Found initrd fallback image: /boot/initramfs-5.10-x86_64-fallback.img
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Found Zorin OS 16 (16) on /dev/sda6
Adding boot menu entry for UEFI Firmware Settings …
Found memtest86+ image: /boot/memtest86+/memtest.bin
/usr/bin/grub-probe: warning: unknown device type nvme0n1.
done
It could be your Windows is a BIOS install and Manjaro is EFI.
If that is how it is you can try disabling EFI in firmware - perhaps you can boot your Windows - I don’t know.
5 EFI partitions? 
should i delete them ? i think it is old os’s efi that i installed before
The EFI partition shall be shared across all installed OS, it’s weird each installation creates a new one.
I would indeed get rid of the extraneous ones (on sda).
Though prior to that, i’d check if your Windows has indeed been installed in Legacy mode. Check your BIOS as @linux-aarhus suggested.
If Windows has indeed been installed in Legacy mode, you’ll need to also reinstall Manjaro in Legacy mode in order to have both show in GRUB.
The specification doesn’t state this is necessary - in fact you can have as many as needed.
Usually it is so the first root partition type on the disk with the active ESP is regarded the root filesystem and mounted at /
If you are interested in the subject - Discoverable Partitions Specification - contains a list and at the very bottom of the page some interesting paragraphs.
In my book each OS should always have it’s own boot partition rather it’s MBR or EFI, and rather they’re on the same disk or not.