Warning
Do you have your data backed up? If not, that's the first thing we need to do, as follows:
Download Kyhi's rescue ISO:
Windows 10 Recovery Tools - Bootable Rescue Disk. I just downloaded it and it took 14 minutes for the X64 14393 version from Toolslib, which is the latest available in ISO format. If you want something newer, you have to build your own, which is actually very easy:
Win10XPE - Build Your Own Rescue Media - Windows 10 Forums
Create a bootable flash drive. I do it manually as follows:
Here is a manual (non-Rufus) procedure originally posted by @
NavyLCDR that I recorded and saved (with slight modifications). I've used it many times now and it works under all boot conditions, UEFI/GPT/MBR or CSM/MBR.
1. Use the
Media Creation Tool to download and save the Windows 10 ISO file you need to your hard drive.
2. Insert the USB flash drive.
3. Open a
Administrator Command Prompt. It will say Administrator Command Prompt in the Title bar. Enter the following commands:
4.
diskpart
5.
list disk
6.
select disk # <- replace
# with the actual disk number of the USB flash drive
7.
clean <- this will erase the disk selected above,
make sure you selected the USB flash drive!
7a. If the flash drive shows as
GPT then you need to convert it to MBR:
convert mbr
8.
create part pri
8a.
sel part 1
9.
format fs=fat32 quick
9a.
assign
10.
active
11.
exit
12.
exit - and if the first Command Prompt was not an Administrator Command Prompt,
exit that one too.
13. Mount the ISO you downloaded. If you are using Windows 8 or 10, you only have to right click on it and click on mount. If you are using Windows 7, then you must use a program like
WinCDEmu to mount the ISO file:
WinCDEmu - the easiest way to mount an ISO. And more...
14. Copy all the files and folders from the mounted ISO file to the USB flash drive.
Now you boot the flash drive. It's Win 10 based so you use File Explorer to find your files and folders you want to save and copy them off to an external hard drive or flash drive or use Macrium Reflect to make an image backup of your boot drive to an external hard drive. (Image backup is preferred, that way you will not forget anything).
While your booted from Kyhi's rescue ISO, use Minitool Partition Wizard and grab a screen capture of the boot drive and post it here please.
Once you have that done you can proceed and do a Clean Install:
Windows 10 - Clean Install
The right way to do a Clean Install is to delete all the partitions on the boot drive leave a raw, unallocated drive, then click Next and let the Windows Installer create the partitions it needs. We do need to see the screen capture of Minitool first though.