Most of the times we come across a situation where we try to dual boot system with Fedora/Ubuntu and Windows; and suddenly post installation or update we do not get GRUB screen back.
Well nothing to worry for such trouble as both OS are there installed on your HDD. The only thing is that you need to take extra efforts to boot one of the OSs of your choice.
You may follow below process to get back the GRUB screen. This will ensure to add grub entries into EFI database file.
1. Go to Windows prompt.
2. Run prompt with Administrator rights.
3. Type following command
bcdedit /set {bootmgr} path \EFI\Fedora\grubx64.efi
4. Reboot your system and you shall be able to see GRUB screen.
Note: If still GRUB is not seen then add other files with above command again. Files like: shim.efi, shim-fedora.efi, etc
Above solution will work if you are able to get inside Windows. If you are not then same changes to the database can also be done by getting into BIOS settings and doing respective modifications.
Well nothing to worry for such trouble as both OS are there installed on your HDD. The only thing is that you need to take extra efforts to boot one of the OSs of your choice.
You may follow below process to get back the GRUB screen. This will ensure to add grub entries into EFI database file.
1. Go to Windows prompt.
2. Run prompt with Administrator rights.
3. Type following command
bcdedit /set {bootmgr} path \EFI\Fedora\grubx64.efi
4. Reboot your system and you shall be able to see GRUB screen.
Note: If still GRUB is not seen then add other files with above command again. Files like: shim.efi, shim-fedora.efi, etc
Above solution will work if you are able to get inside Windows. If you are not then same changes to the database can also be done by getting into BIOS settings and doing respective modifications.