Windows 10 Fall Creators Update with unsigned mmc.exe

Solution 1:

I reinstalled Windows 10 by keeping my data. There are drawbacks like you need to reinstall some applications. Windows will generate a list with currently installed applications and put it on your desktop Removed Apps.html.

Steps to do it (as explained here https://www.youtube.com/watch?v=5Zkvlcnv-UU )

1. Boot in Advanced Start-Up
   • Start > Settings > Recovery > Advanced start-up > Restart now
   • More ways to go in Advanced Start-Up: https://www.lifewire.com/how-to-access-advanced-startup-options-in-windows-10-or-8-2626229
2. After restart in Advanced Start Up:

   Troubleshoot > Reset this PC (Lets you choose to keep or remove your files, then re-installs Windows) > Keep my files

3. Save some files from c:\Windows.old\ that contains

   Users
   Program Data
   Program Files
   Program Files (x86)
   

4. Copy additional data from old profiles from Users/ to new ones.

5. Reinstall applications found in Desktop > Removed Apps.html
6. Cleanup old install (https://www.windowscentral.com/how-properly-remove-windowsold-folder-windows-10)

   Win+E > This PC > (right click) > Properties > Disk Cleanup > Clean up system files > Previous Windows installation(s) > Ok > Delete Files > Yes