For recovering data I recommend using Fatdog64 which can boot with SecureBoot enabled. Download the Fatdog64 iso and burn it to a CD by right clicking on a Windows 7 or later computer and selecting Burn Disk Image. If a CD is not available a blank USB flash drive with Rufus can be used. After recovering your data to an external drive you can do a clean install of Windows 10 using the Media Creation Tool. There may be an issue with Fatdog recovering files as Windows 10 has a kind of hybrid shutdown. You should be able to access the partitions as read only and still recover your data.
Windows 10 Media Creation Tool
Run Rufus with the USB flash drive attached. Select MBR partition scheme for BIOS and UEFI. Leave all boxes as checked. Where FreeDos is shown in the dropdown box select iso image, click the icon, and browse to the Fatdog iso file. Press Start. Any data on the flash drive will need to be backed up as the drive will be formatted.
Fatdog copy instructions;
Boot Fatdog to the desktop. In the lower left of the desktop you will see your partitions listed as sda1...sda2...sda3...etc. On an upgraded computer from 7 or 8 you will see quite a few. Normally your Windows partition will be on sda3 but it may be different in your case. Click once on the partition icon. The partition should mount and a File Manager Window will open. If you do not see your files/folders then close the Window and click on another sdaX icon. Once you find your correct partition attach your external USB drive. A USB icon will appear on the desktop. Click once on it and another File Manager Window will open. You can resize and move the two windows until they are side by side by left clicking and dragging the corner and title bar similar to Windows. Once you have both windows side by side highlight the data you want to copy by pressing Ctrl and left clicking or left clicking and dragging a window around your files/folders. You only need to click once to open a folder in Fatdog. Once you have your files/folders highlighted drag them from the sdaX window to the USB flash drive window. A small dialog window will open. Select Copy and check the quiet box. Don't forget your browser bookmarks or email if using a client. Once all your files are copied exit out of Fatdog. You may want to open a few to see if the copy was successful