How to remove Windows 10 from Windows Boot Manager after uninstalling it?

I installed Windows 7 on one partition and formatted the other where I had Windows 10 installed leaving only that one Windows 7 OS on my drive, but I still have two OSs offered in Windows Boot Manager. What is even weirder is that their names are reversed, when I choose Windows 10, it's Windows 7 that gets loaded.

3 Answers

To delete a version from the Windows Boot Manager screen:

1. Start the program msconfig
2. Go to the Boot tab
3. Select which Windows version you’d like to boot into directly
4. Press Set as Default
5. Delete the other version by selecting it and clicking Delete
6. Click Apply
7. Click OK
8. Restart the computer.

As an alternative to @harrymc's answer, you can also use the Windows command line tool BCDEDIT to configure the Windows Boot Manager from an elevated command prompt. The following instructions assume you are booted into Windows 7.

1. to open an elevated command prompt, press Win+R to open the Run dialog, then type:

   cmd /admin

2. to list the Boot Manager settings, type:

   bcdedit

3. To remove another entry, take note of the entry's identifier hex string (e.g. {00000000-0000-0000-000000000000}) and type:

   bcdedit /delete {00000000-0000-0000-000000000000} /remove

4. To rename the description of the {current} entry to "Windows 7", type:

   bcdedit /set {current} description "Windows 7"

5. If you wish to not display the Boot Manager on boot if you only have one entry, you can use this command:

   bcdedit /set {bootmgr} displaybootmenu no

Win 10: Try going to your BIOS and reset to defaults. It worked for my HP laptop after I migrated to SSD using macrium reflect 7.x.