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@vtvh
Created June 28, 2026 05:14
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fix grub dualboot
Perfect. Looking at your terminal, we have exactly what we need.
Here is the translation of your partition table:
* **EFI System Partition:** /dev/nvme0n1p1 (This is where the bootloader lives)
* **Linux Filesystem (Root):** /dev/nvme0n1p5 (This is your Parrot OS)
Here are the exact commands you need to run in your terminal, one by one. I have plugged your specific partition numbers in for you.
### Step 1: Mount the Partitions
1. Mount your Parrot OS root partition:
```bash
sudo mount /dev/nvme0n1p5 /mnt
```
2. Ensure the EFI directory exists, then mount your EFI partition:
```bash
sudo mkdir -p /mnt/boot/efi
sudo mount /dev/nvme0n1p1 /mnt/boot/efi
```
### Step 2: Bind the System Directories
Copy and paste this entire line and press Enter. This links your live USB hardware environment to your installed system:
```bash
for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done
```
### Step 3: Chroot and Rebuild GRUB
1. Enter the chroot environment (your terminal prompt will change to indicate you are now "inside" your Parrot OS installation):
```bash
sudo chroot /mnt
```
2. Reinstall GRUB to the main NVMe drive (note that there is no partition number at the end of this command):
```bash
grub-install /dev/nvme0n1
```
3. Update the GRUB configuration to detect both Parrot and Windows:
```bash
update-grub
```
### Step 4: Clean Up and Reboot
If update-grub finishes without errors and lists your Linux and Windows boot managers, you are good to go!
1. Exit the chroot environment:
```bash
exit
```
2. Restart your computer safely:
```bash
reboot
```
Pull out your USB drive when the screen goes black, and your GRUB menu will be right back where it belongs.
@vtvh

vtvh commented Jun 28, 2026

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└──╼ #efibootmgr -v
BootCurrent: 0000
Timeout: 2 seconds
BootOrder: 001C,0010,0011,0012,0013,001B,0018,0017,001A,001D,001E,0019,0000
Boot0000* Windows Boot Manager  HD(1,GPT,d22448aa-33e7-45c6-adde-0fd7e16d5c00,0x800,0x32000)/File(\EFI\Parrot\grubx64.efi)57494e444f5753000100000088000000780000004200430044004f0042004a004500430054003d007b00390064006500610038003600320063002d0035006300640064002d0034006500370030002d0061006300630031002d006600330032006200330034003400640034003700390035007d00000000000100000010000000040000007fff0400
      dp: 04 01 2a 00 01 00 00 00 00 08 00 00 00 00 00 00 00 20 03 00 00 00 00 00 aa 48 24 d2 e7 33 c6 45 ad de 0f d7 e1 6d 5c 00 02 02 / 04 04 34 00 5c 00 45 00 46 00 49 00 5c 00 50 00 61 00 72 00 72 00 6f 00 74 00 5c 00 67 00 72 00 75 00 62 00 78 00 36 00 34 00 2e 00 65 00 66 00 69 00 00 00 / 7f ff 04 00
    data: 57 49 4e 44 4f 57 53 00 01 00 00 00 88 00 00 00 78 00 00 00 42 00 43 00 44 00 4f 00 42 00 4a 00 45 00 43 00 54 00 3d 00 7b 00 39 00 64 00 65 00 61 00 38 00 36 00 32 00 63 00 2d 00 35 00 63 00 64 00 64 00 2d 00 34 00 65 00 37 00 30 00 2d 00 61 00 63 00 63 00 31 00 2d 00 66 00 33 00 32 00 62 00 33 00 34 00 34 00 64 00 34 00 37 00 39 00 35 00 7d 00 00 00 00 00 01 00 00 00 10 00 00 00 04 00 00 00 7f ff 04 00
Boot0010  Setup FvFile(721c8b66-426c-4e86-8e99-3457c46ab0b9)
      dp: 04 06 14 00 66 8b 1c 72 6c 42 86 4e 8e 99 34 57 c4 6a b0 b9 / 7f ff 04 00
Boot0011  Boot Menu     FvFile(126a762d-5758-4fca-8531-201a7f57f850)
      dp: 04 06 14 00 2d 76 6a 12 58 57 ca 4f 85 31 20 1a 7f 57 f8 50 / 7f ff 04 00
Boot0012  Diagnostic Splash Screen      FvFile(a7d8d9a6-6ab0-4aeb-ad9d-163e59a7a380)
      dp: 04 06 14 00 a6 d9 d8 a7 b0 6a eb 4a ad 9d 16 3e 59 a7 a3 80 / 7f ff 04 00
Boot0013  Lenovo Diagnostics    FvFile(3f7e615b-0d45-4f80-88dc-26b234958560)
      dp: 04 06 14 00 5b 61 7e 3f 45 0d 80 4f 88 dc 26 b2 34 95 85 60 / 7f ff 04 00
Boot0014  Startup Interrupt Menu        FvFile(f46ee6f4-4785-43a3-923d-7f786c3c8479)
      dp: 04 06 14 00 f4 e6 6e f4 85 47 a3 43 92 3d 7f 78 6c 3c 84 79 / 7f ff 04 00
Boot0015  Rescue and Recovery   FvFile(665d3f60-ad3e-4cad-8e26-db46eee9f1b5)
      dp: 04 06 14 00 60 3f 5d 66 3e ad ad 4c 8e 26 db 46 ee e9 f1 b5 / 7f ff 04 00
Boot0016  MEBx Hot Key  FvFile(ac6fd56a-3d41-4efd-a1b9-870293811a28)
      dp: 04 06 14 00 6a d5 6f ac 41 3d fd 4e a1 b9 87 02 93 81 1a 28 / 7f ff 04 00
Boot0017* USB CD        VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,86701296aa5a7848b66cd49dd3ba6a55)
      dp: 03 0a 24 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 86 70 12 96 aa 5a 78 48 b6 6c d4 9d d3 ba 6a 55 / 7f ff 04 00
Boot0018* USB FDD       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,6ff015a28830b543a8b8641009461e49)
      dp: 03 0a 24 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 6f f0 15 a2 88 30 b5 43 a8 b8 64 10 09 46 1e 49 / 7f ff 04 00
Boot0019* NVMe0 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,001c199932d94c4eae9aa0b6e98eb8a400)
      dp: 03 0a 25 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 00 1c 19 99 32 d9 4c 4e ae 9a a0 b6 e9 8e b8 a4 00 / 7f ff 04 00
Boot001A* ATA HDD0      VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f600)
      dp: 03 0a 25 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 91 af 62 59 56 44 9f 41 a7 b9 1f 4f 89 2a b0 f6 00 / 7f ff 04 00
Boot001B* USB HDD       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,33e821aaaf33bc4789bd419f88c50803)
      dp: 03 0a 24 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 33 e8 21 aa af 33 bc 47 89 bd 41 9f 88 c5 08 03 / 7f ff 04 00
Boot001C* PCI LAN       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,78a84aaf2b2afc4ea79cf5cc8f3d3803)
      dp: 03 0a 24 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 78 a8 4a af 2b 2a fc 4e a7 9c f5 cc 8f 3d 38 03 / 7f ff 04 00
Boot001D  Other CD      VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a35406)
      dp: 03 0a 25 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b ae a2 09 0a df de 21 4e 8b 3a 5e 47 18 56 a3 54 06 / 7f ff 04 00
Boot001E  Other HDD     VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f606)
      dp: 03 0a 25 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 91 af 62 59 56 44 9f 41 a7 b9 1f 4f 89 2a b0 f6 06 / 7f ff 04 00
Boot001F* IDER BOOT CDROM       PciRoot(0x0)/Pci(0x14,0x0)/USB(11,1)
      dp: 02 01 0c 00 d0 41 03 0a 00 00 00 00 / 01 01 06 00 00 14 / 03 05 06 00 0b 01 / 7f ff 04 00
Boot0020* IDER BOOT Floppy      PciRoot(0x0)/Pci(0x14,0x0)/USB(11,0)
      dp: 02 01 0c 00 d0 41 03 0a 00 00 00 00 / 01 01 06 00 00 14 / 03 05 06 00 0b 00 / 7f ff 04 00
Boot0021* ATA HDD       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f6)
      dp: 03 0a 24 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 91 af 62 59 56 44 9f 41 a7 b9 1f 4f 89 2a b0 f6 / 7f ff 04 00
Boot0022* ATAPI CD      VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a354)
      dp: 03 0a 24 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b ae a2 09 0a df de 21 4e 8b 3a 5e 47 18 56 a3 54 / 7f ff 04 00
Boot0023* PCI LAN       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,78a84aaf2b2afc4ea79cf5cc8f3d3803)
      dp: 03 0a 24 00 d2 38 78 bc 82 0f 60 4d 83 16 c0 68 ee 79 d2 5b 78 a8 4a af 2b 2a fc 4e a7 9c f5 cc 8f 3d 38 03 / 7f ff 04 00

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