[gkhenderson]

Originally Posted by DNSB

Update to noDRM's version v10.0.3 or at least to Apprentice Harper's v7.21. The version you are running is an old version that is Python 2 only. Calibre since version 5.0 has used Python 3.

I have found thst Calibre does eventually run if left alone but it takes 40-45 minutes. thanks for the advice on the DRM plugins. I have done that but it made no difference - still sits for 40 minutes then starts. I think it maybe a Windows Defender issue as I am also running Acronis.