Who'd have thought that was the problem.
I'm not sure what that recovery disk is that you have as you can create a system repair disk as well as a Win 10 bootable disk with which you can boot into the recovery options or do a repair install so that you don't lose your files.
I'm not sure if this would work on a machine that came with Win 10 preinstalled but you can change the bootmenupolicy so that you get the F2 and F12 prompt as you switch on - this also gives you the F8 or equivalent for the make & model of computer.
It's possible the F8 could have helped by giving you the option to restore to an earlier point.
While this increases the boot time to that of a Win 7 machine, it's handy should you not be able to get into Windows.
To do this, open a Command Prompt (Admin) and enter bcdedit
That should pop up a window where you need to check if it displays current or default next to Default - that is the Identifier.
Mine is current so I'll use that as an example.
Enter bcdedit /set {current} bootmenupolicy legacy
That should return as successful.
Enter exit to close the cmd window then go to Power Options - click on Choose what closing the lid does then on Change settings that are currently unavailable and uncheck the box for fast start up.
Shutdown and then switch back on and you'll see the keys as they were in Win 7.
To revert, redo the bcdedit command again changing legacy for standard and re-check the fast startup box.
You can use the F2 key to boot into the Bios (Setup) to change the boot order so that it permanently reads the DVD and USB drives before the HDD so that you can boot up with either of those disks should you have problems in the future.
You may have different options with an EUFI boot as I don't have an EUFI machine to compare with.
You can create the latest version of Win 10 which includes the Autumn update by using the Media Creation Tool (MCT).
Download that lower down the page at
https://www.microsoft.com/en-gb/software-download/windows10 and use the second option for installing on another PC and use the ISO option - clicking on Save on the download.
This is a 3.37GB download.
You can use Windows USB/DVD Burner Tool to create bootable media of your choice.
https://www.microsoft.com/en-gb/download/windows-usb-dvd-download-toolIt would be prudent to create external full system images as you add to your files.
There's a couple of ways that you can do this, All Control Panel Items - File history and click on System image and backup in the bottom left corner or Control Panel - System and Security/backup and restore (Windows 7).
Insert/plug in the external media then click on Create a system image.
You'll also see the option to create a System Repair disk.
Tapping F8 as you switch on or booting up with the system repair disk will lead you to restoring with your system image.
BTW - I don't mind the Win 10 default start menu as it is, although I don't know what it will look like after the Autumn update - still haven't managed to update to that