A couple of days after rolling out its latest minor update to Windows 10 Mobile Insiders, Microsoft is rolling out updates with the same build number to Windows 10 PC and Windows 10 IoT users.

On January 11, Microsoft updated its Windows 10 IoT Core operating system to Build 10586.63. On January 12, Microsoft made available to Windows 10 users who aren't part of the Insider test program a new cumulative update that's also designated as Build 10586.63.

What's new in each of these builds all labeled 10586.63 is different, even though they are all updates to the Windows 10 November update (known both as Windows 10 Version 1511, and also sometimes also plain-old 10586).

Windows 10 IoT Core devices will get the 10586.63 update automatically. It brings new stability improvements to the IoT Core secure shell (SSH) and enhancements to the Windows Device Portal, according to a brief company blog post. Today's update follows the release of the November update (10586/Windows 10 1511) for IoT Core late last year.

Windows 10 for PCs and tablet users will see 10586.63 marked as a cumulative update for Windows 10 Version 1511. This update -- also available as KB3124263 -- includes a bunch of security updates for Windows and IE. These updates are among those Microsoft released as part of its regular January Patch Tuesday updates on January 12.

Windows 10 Mobile users who aren't in the Insider preview program haven't yet gotten the 10586.63 update, as far as I know. But those Windows Phone users who are part of the Insider program got 10586.63 on January 8. Microsoft officials said little about what was in that update, but a poster on Reddit who claimed to be representing Microsoft listed a handful of minor, specific updates as being what's new in that build.

The result of all this numerology: As of today, many, but not all, of the Windows 10 devices out there are now all able to run the same build number (10586.63) of Windows 10, for what that's worth.

In a somewhat related development, HTC officials have acknowledged that HTC 8X users aren't going to get Windows 10 Mobile for their phones once that update begins rolling out for existing Windows Phone 8.x handsets. Microsoft officials still haven't revealed a list as to which existing handsets will be upgraded to Windows 10 Mobile. All they have said is the Windows 10 Mobile update should start rolling out in "early" 2016.