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NugentS · 08-04-2025, 06:25 PM

Hi,

Whenever I try to install Calibre I get the following attached:

It says error 2503 (The installer has encountered an unexpected error)

Calibre (the installed version works), but I cannot upgrade

Any thoughts?

08-04-2025, 06:25 PM	#1
NugentS Member Posts: 11 Karma: 10 Join Date: Jun 2011 Device: Kindle	Unable to upgrade Calibre Hi, Whenever I try to install Calibre I get the following attached: It says error 2503 (The installer has encountered an unexpected error) Calibre (the installed version works), but I cannot upgrade Any thoughts? Attached Thumbnails