I got notifications on the two desktops but so far not on the laptop....
... perhaps that indicates that the laptop is not man enough to run it in which case I'll pass on all three...
You would have to have the laptop equivalent of PeeWee Herman for it not to run according to the specs on Microsoft's website:
If you want to upgrade to Windows 10 on your PC or tablet, here’s what it takes.
Latest OS: Make sure you are running the latest version either Windows 7 SP1 or Windows 8.1 Update.
Processor: 1 gigahertz (GHz) or faster processor or SoC
RAM: 1 gigabyte (GB) for 32-bit or 2 GB for 64-bit
Hard disk space: 16 GB for 32-bit OS 20 GB for 64-bit OS
Graphics card: DirectX 9 or later with WDDM 1.0 driver
If all else fails you can manually get the reservation herehttp://www.microsoft.com/en-us/windows/features