I bought a new Acer Aspire ES1-111M-C40S a year and a half ago. It came withe label "Windows 10 Now" and "Free Windows 10 upgrade." I ran the upgrade successfully.
Two weeks ago the notebook/netbook crashed, and I could not boot into Windows. I could still access the boot menu by pressing F2 while turning on the power, but that didn't help.
Searching Acer online, and not finding any help, I finally found the Acer USB Recovery Drive compatible with my Aspire ES1-- 's SNID. I ordered it (cost me about $47 with tax you'd think a computer should come with recovery media).
Although I was able to boot from the recovery drive (I used the USB2 port -- I'd read online that this model of Acer has firmware problems and does not boot from USB3) -- it took several tries to recover and restore the computer. After several tries last night, I started it up again and turned in for the night. This morning, I had Windows 8.1.
Problem. I'd never used 8.1, and had bought this computer because of the upgrade offer. Seems the upgrade offer has expired, as of about a year ago. Is there any way of upgrading to 10 without buying Windows 10 from Microsoft? Can (or will, or would) Acer help.