Windows 10

On my main computer got icon to update to Windows 10, but on my laptop no icon? have updates to download automatically on laptop. Does anyone know if there a number for the update, if so what is it.
Thanks
Answer #1
If you want the update: KB 3035583
Make sure the machine is one of the following:
Article ID: 3035583 - Last Review: May 14, 2015 - Revision: 2.0
Applies to
•Windows 8.1 Pro
•Windows 8.1
•Windows 7 Service Pack 1, when used with:
Windows 7 Ultimate
Windows 7 Professional
Windows 7 Home Premium
Windows 7 Home Basic
Windows 7 Starter
Disable Windows Update and reboot.
Enable Windows Update and let it check for updates.
Answer #2
Many thanks