Should I take my last chance of a free upgrade to Windows 10?

John has upgraded one of his two laptops to Windows 10 but doesn't want to lose Windows 7 on the other. Does he have to upgrade it before 29 July, to avoid paying?

I have two laptops: one started with Windows 7 and the other with Windows 8. I've upgraded the second machine to Windows 10 and left the first on Windows 7. Microsoft keeps telling me to upgrade before 29 July as it "qualifies" but I don't want to lose my Windows 7.

If/when I master Windows 10, can I use my copy of Windows 10 to upgrade my Windows 7 laptop, or can I store a copy of Windows 10 on my Windows 7 laptop until required? I don't want to pay 100 (?) for a retail copy of Windows 10. John G

If you are ever likely to want Windows 10 on any PC, then you should upgrade it before 29 July. This is true even if you don't intend to use Windows 10 for a few years, if ever.