Log-in problem

I am having difficulties with logging-in. It began with no longer being able to use my PIN code, but having to use my password instead. I went to Settings, intending to refresh my PIN code but found that the sign-in options page will not open. Then I found that I could not sign-in to the computer itself, even with my password, because Windows gets stuck in the sign-in page, which freezes. The box to enter the password did not appear.

My hybrid PC is dual boot, the Android OS launches OK so I could use that for browsing, emailing until the Windows problem was cleared up. However, surprisingly the link to switch from Android to Windows also worked, and Windows can be launched in the usual way via Android, with the password although the PIN code method is still not available --- all rather inconvenient but workable for a while.

The sign-in options page still will not open, so there are now two things to be fixed: (1) the sign-in options and PIN in Settings (2) signing in directly from Windows rather than indirectly via Android.

I have employed sfc / scannow and DISM without success.

Thanks for your speedy reply. sfc/scannow reports that there is 'no file corruption'. DISM 1 reports that 'the image can be repaired' 2. says it is not relevant 3. says the 'source file cannot be found' --- an issue which has appeared before.

Update history says up-to-date. MS account is OK (PIN option does not apply). Sign-in options still cannot be opened -- why is there a statement that 'some settings are managed by your organisation' when I do not have 'an organisation'.

I may have one Restore Point which goes back far enough. I have not tried it yet because it will remove a number of apps which I have spent many hours configuring so I am hoping for some other repair option. But I have used Restore once without affecting the Android OS.

FastStart and Hibernation are not enabled. I have two RestorePoints, one from after and one (I think) from before the log-in problem appeared.

There is no link to the tutorial?

My Cube iWork 10.1 Ultimate is promoted and supplied as dual boot, Windows and Android (as are some other similar Chinese hybrid PC / tablet PCs.)

I will try to check out Fast Boot and DISM further. DISM has been troublesome for some time and I have not found how to repair it.

Thanks for the link, I will take a look.
Regarding the mistake over my PC model, that was my fault. I should have updated the specs on this site and will try to do it now. I replaced the Quantum View with the Cube iWork several months ago.

"why is there a statement that 'some settings are managed by your organisation' when I do not have 'an organisation'"

Go to Action Center/All settings/Privacy\Feedback & diagnostics. If 'Diagnostics and usage data' is set to "Basic".
Change it to "Enhanced" or "Full (Recommended)"