Hi PeterT
I had moved back to a restored version of my system to a time that was before my problems. Still same problem.
Your suggestion seems to have cured it - I was using a card reader with 3 USB ports. I pulled this out and connected my Calibre database directly to a USB port. Now View is working again with mobi files!!
Thank you very much for that suggestion. The Card Reader combined USB works fine on my laptop but not on my main PC.
mitch13
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