On all Windows PCs I now have no less than 3 logins.

1. The Microsoft email based one. (I don't use it much.)
2. The account I use all the time which is a local login.
3. A backup admin account which is a local login.

Why 3? It happened about Windows 8 with Microsoft's email login. There's a fellow called Steve Wozniak that has talked about over reliance on the cloud.

Ask the tablet maker for how to get in now.