On booting up my main computer this morning it wouldn't accept my Windows logon password. I'm not sure why. It wanted my Microsoft account password which is different to the Windows logon password. The other option it gave me was that I could create a pin number logon password. I knew my Microsoft account password so I booted into Windows and tried to get my old Windows logon password back by logging into my Microsoft account. When I tried to change the Windows logon password back to my old familiar one it said the password I entered was an old one and I needed to create a new one! I've got three desktop computers and didn't want my main computer to have a different Windows logon password so I restored an Acronis image made a month ago. Thank God for Acronis True Image!