Quote:
Originally Posted by brutor2
Hi Guys,
I tried with the portable version on another computer and it works.
Yet Windows 10 is the same.
Surely a problem related to my OS on this computer.
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What about the AV or other 3rd party programs in startup, are they the same on both computers? They're often the cause of inexplicable problems, and they often update themselves silently.
Quote:
Originally Posted by brutor2
I do not understand why.
I'm going to have to work my library on two computers. 
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Try giving calibre a dedicated folder for temporary files, see CALIBRE_TEMP_DIR in
Environment variables.
BR