Quote:
Originally Posted by Sirtel
An ancient ADE 2.0 works on my Windows 10 computer, so as with Calibre, it's apparently not recent Windows versions that are the problem, but something specific to your computer. Otherwise ADE would not work on any Windows 10/11 machine and that's clearly not the case.
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Well, both my old and "new to me" computers are Lenovo products. @theducks described how a missing driver (I think) was the cause of a problem that had not been detected by any scans but by a new app complaining that something that it needed was missing. Since Lenovo did automatic scans and updates on my old Lenovo ThinkPad, perhaps that had taken place as well as the Win update. All Ii know is that after years of no problems I was suddenly unable to open epubs with anything but the Calibre editor. And if it is a problem with some Lenovo driver, I suppose it could cause the same difficulty with the ThinkCentre. No idea. I'm just grateful that as a result of posting about my problem I learned about the portable version of Calibre. It works perfectly! So while not a perfect ending, it is a happy one, nonetheless.