The program does not launch the interface.

Frantishek · 11-02-2025, 03:02 AM

Unexpectedly, after restarting the computer (Windows 10) and with no device connected, the program stopped launching.
The interface initialization window appears. In Task Manager, there is a running process called - calibre worker process.
The previous session of the program was closed correctly by clicking Exit.

What has been done to try to fix this (the hanging process is terminated manually):

1. Reinstalled the latest portable version of the program.
2. Moved the portable program folder to the root directory of the disk.
Neither helped.

What should I do next? (It’s very important not to lose the settings — a lot has been customized in the interface and many plugins have been installed)
There were many plugins installed, but the program worked fine with them for more than ten days and launched successfully after each closing.

Possible cause: around the same time, I configured another program and changed the Python environment in the system (in case that might be related).

kovidgoyal · 11-02-2025, 07:28 AM

https://manual.calibre-ebook.com/faq...ing-on-windows

11-02-2025, 03:02 AM	#1
Frantishek Junior Member Posts: 1 Karma: 10 Join Date: Nov 2025 Device: ONYX BOOX Note MAX	The program does not launch the interface. Unexpectedly, after restarting the computer (Windows 10) and with no device connected, the program stopped launching. The interface initialization window appears. In Task Manager, there is a running process called - calibre worker process. The previous session of the program was closed correctly by clicking Exit. What has been done to try to fix this (the hanging process is terminated manually): 1. Reinstalled the latest portable version of the program. 2. Moved the portable program folder to the root directory of the disk. Neither helped. What should I do next? (It’s very important not to lose the settings — a lot has been customized in the interface and many plugins have been installed) There were many plugins installed, but the program worked fine with them for more than ten days and launched successfully after each closing. Possible cause: around the same time, I configured another program and changed the Python environment in the system (in case that might be related).

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11-02-2025, 07:28 AM	#2
kovidgoyal creator of calibre Posts: 45,609 Karma: 28549044 Join Date: Oct 2006 Location: Mumbai, India Device: Various	https://manual.calibre-ebook.com/faq...ing-on-windows