🐧 Fix GRUB Not Showing Windows After Kali Linux Install (2025 UEFI Guide)

Just installed Kali Linux, but the GRUB boot menu doesn't list Windows? You're not alone. This is a common issue, especially on UEFI systems in 2025. Don’t worry — your Windows is still there. Here's how to fix it safely.

⚠️ Why This Happens

• Windows bootloader wasn’t detected by GRUB during Kali install
• Kali didn't run os-prober or update-grub properly
• Fast Boot / Secure Boot is blocking the boot entries

✅ Confirm Windows Is Still There

Boot into Kali Linux and open the terminal. Run:

sudo fdisk -l

Look for a partition labeled NTFS — that’s your Windows drive. If it’s there, you can fix GRUB easily.

🔧 Fix 1: Re-run GRUB Configuration

1. Boot into Kali Linux
2. Open terminal and run:

   sudo os-prober
   sudo update-grub

3. If Windows is detected, reboot. You’ll now see Windows in the GRUB menu.

🔧 Fix 2: Mount EFI Partition & Reinstall GRUB (Advanced)

If GRUB was installed incorrectly, do this:

sudo mount /dev/sdXn /mnt             # Replace with your Kali root partition
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys /mnt/sys
sudo chroot /mnt
grub-install /dev/sdX                 # Your main disk (not a partition)
update-grub
exit
reboot

Find the correct drive using lsblk. Usually /dev/sda.

🔧 Fix 3: Check UEFI Boot Order

• Enter BIOS/UEFI settings (press F2/DEL during boot)
• Under “Boot Order” → Move “Ubuntu” or “Kali” entry to the top
• Save & Exit

🧠 Pro Tips

• Install Kali in UEFI mode if Windows is also UEFI
• Disable Fast Startup and Secure Boot in Windows before dual boot
• If all else fails, use Boot Repair from a live Ubuntu USB

💬 Still Not Working?

Try this boot repair tool:

• Boot Repair (Live ISO)
• Boot from it and select “Recommended Repair”

📌 Final Thoughts

Don’t panic if Kali Linux installs but Windows vanishes from GRUB. Your data is safe — it’s just a bootloader issue. Follow the steps above, and your dual boot system will work perfectly again.

Got stuck? Share your boot info or error at Tsupports.blogspot.com and we’ll help you fix it.