Windows 8.1

I have asked this question before but I cannot seem to locate it.

I have installed Windows 8.1 three times on my computer. Twice I had to reinstall it after upgrading to Windows 10 and not being happy with it.
With one install, I did not have to use to a password to access my computer. Now, I cannot use my computer without using a password and my email account to log on.
The primary issue that I have is my computer tries but does not succeed in rebooting itself automatically whenever the internet connection is removed. I am still using a wired modem despite Comcast wanting me to go wireless.
So basically, if my power should fail or if Comcast should have any issues with providing internet service, I might be stuck with an expensive door stop.
Any suggestions/solutions for both issues would be appreciated

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Clarification Request
None of this makes sense

what you described as formerly normal for you,.....isn't normal for everyone else. Password for windows, or for Comcast, or for the router, or something else? Why should windows reboot just because an internet connection is turned off or removed? Why would Comcast want you to go wireless, which is less secure, than continuing with wired system?

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That sounds like you are not using a local login.

Create a new account (make 2!) that are admin capable but make them Local Logins. This is all over the web so I'll pause here.

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