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I used my PC which has SSD with windows installed. I unplugged my laptop HDD and connected it to PC and it was working fine.

Then I unplugged laptop hdd from PC and installed ubuntu on PC, works fine.

Now when I connect HDD(windows) to PC and in BIOS I select to boot from that HDD it boots in Ubuntu...

Also I tried via grub menu, it only shows ubuntu

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    If you unplug system with UEFI boot, it forgets the UEFI boot entry. And may keep old entries which then you should houseclean. To repair Windows use a Windows repair flash drive or full installer with repair console. To remove Ubuntu UEFI entry use efibootmgr from Ubuntu live installer. https://askubuntu.com/questions/1198221/cloning-ssd-also-cloned-boot-options/1198228#1198228 – oldfred Jan 30 '22 at 19:00
  • You can use 'super_grub2_disk_hybrid_2.02s10.iso' or an 'Ikki-boot.iso' to boot from. ( put it on a usb-stick). If you boot form there 'super_rub2_disk' will recognize all your bootable systems. Boot to the system you want and do the repair(s) needed. – Joepie Es Jan 30 '22 at 21:21
  • Hey, thanks for the comment.

    I fixed the issue by simply updating my kernel version

    – cinikbrate Feb 03 '22 at 17:45

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