Win8 on laptop PW protected, Desktip no; now being asked for PW on DT

Here is a mystery!

My laptop is running Win 8.1 and, because it's portable, I password protected it.

Yesterday I  upgraded my desktop; which is not password protected, by adding some memory, a SSD and Win 8 and had it set up to duel boot; Win 7 or Win 8.

When I got it home it booted right up and I went to work adding software and configuring things.  That was two days ago.  This morning I woke it up, as usual but later today it stopped me from logging on; it wanted a password!

I freaked out, how did my desktop computer; that has never had a password, it get locked? This isn't something that happens by mistake, or when your not paying attention!

But then I noticed my laptop's icon on the login page.  How did that get there; from my laptop?  

I decided that, since my laptop icon was on the desktop that maybe my laptop password would work; and it did!

How in the world did my laptop icon and password get connected to my desktop?
mikecox_Asked:
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Alan HendersonRetired marine engineerCommented:
I suspect it's because you logged into your Microsoft account.
If so, your Microsoft account password should get you in.
:)
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rindiCommented:
Windows 8.x and the m$ account which as mentioned above you are probably using, gets synced between your devices from via OneDrive. So if you set a password that will automatically sync to all your Win8.x devices.
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mikecox_Author Commented:
Clearly that is that case, because my MS account password was what got me in.
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