I bought my Acer Aspire E1-572 in March 2014 with a preinstalled Windows 8. I upgraded to 8.1 and then to Windows 10. Then a friend noticed that my laptop was running very slow and offered to create a separate partition for all my personal files. He wiped it all clean without realising that preinstalled Windows doesn't come with an oldfashioned label of the product key for Windows so now I have a Windows 10 version that cannot be activated. The vendor referred me to Microsoft, they referred me to Acer but ..I am out of warranty. I am afraid to attempt refreshing my laptop since there is no previous version of Windows 8 left on it to go back to. Pleeeaaaaase HELP!