Well, expiration has become a moot point - yesterday I found my Win7 HP laptop displaying a screen saying "Installing Windows 10 Update - Do not switch off your PC". I had NOT clicked accept. This morning (!) the installation was complete. I could have declined to accept the ms licence, but in view of their amazingly arrogant behaviour I wasn't sure I wouldn't lose everything. I declined all the snooping and new default app options and now have to find out what does and doesn't work on my Win10 laptop. Words fail me - which is quite unusual!