device not ready

<p>It depends, there are known problems with some hardware, if your device has Thunderbolt, for example, the update is on hold, because the drivers don't work properly and there are issues with unplugging and re-plugging. That said, I pushed it (WSUS) to my work laptop (ThinkPad T480) with Thunderbolt and so far, it hasn't caused any problems, although I haven't undocked it whilst in use, yet.</p><p>The updates often require new drivers or firmware updates, because faults in the previous versions have been surfaced due to changes in Windows behaviour (within the "rules", but different to previous versions – E.g. optimized UI processing) or new versions of specific applications and until those patches are officially made available, there are delays in rolling out the new versions – although manually installing will often not show any problems, <em>if you are lucky.</em></p><p>Why Microsoft's own kit isn't ready is an enigma and a poor show for Microsoft.</p><p>The other thing is, they will have information from the Insiders, which kit is least likely to cause problems and that will be prioritized first, once those devices (and there might be some seemingly odd choices) have upgraded and not showing any major issues, they might be slow to roll it out to other hardware.</p><p>And as it is partially Insider driven, it isn't surprising that current hardware is under represented, Insiders will also often put it on secondary PCs and not their primary devices, so those older devices have a "better" track record than newer kit.</p>