Calibre not starting

[sdrawkcab]

I hadn't used Calibre for a while but now it won't open.
Windows 10
6.27.0

A background process appears every time I try to run it.

calibre-debug -g outputs thusly:

calibre 6.27 embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.10.1
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: None

I've run as admin, uninstalled/reinstalled but still the same.

[kovidgoyal]

https://manual.calibre-ebook.com/faq...s-occasionally

in particular i would guess your calibre window is offscreen

[sdrawkcab]

Thanks for the quick reply! I'll try installing but not starting from the wizard.

[sdrawkcab]

No luck. The same thing happens. A background process exists but the app is not running.

debug:
calibre 6.27 embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.10.1
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: None

[DNSB]

Do you see the calibre icon in the taskbar? If so, try shift-right click on the icon is the taskbar and then click on Move. Use the right and/or left arrow keys to move the window until it moves into the visible area.

If not, try restarting in safe mode and see if calibre runs then.

[BetterRed]

Windows 10 has a simple way to discover the whereabouts of an 'off screen' window -- right click the taskbar and select Cascade windows. After doing a Cascade… there'll be an Undo cascade… option.

BR

[DNSB]

Sadly in the last version of Windows 10 I have and in all the Windows 11 versions I have, Cascade windows is not present.

[sdrawkcab]

There's no taskbar icon, it doesn't appear in Task View and there is no App process in Task Manager. There is a Background Process.

[BetterRed]

Originally Posted by DNSB

Sadly in the last version of Windows 10 I have and in all the Windows 11 versions I have, Cascade windows is not present.

Cascade windows is available on my Win10:

Windows 10 Pro, Version: 22H2, OS build: 19045.3448 Feature Experience Pack: 1000.19044.1000.0

Try Github: ExplorerPatcher:

Or AHK script: DllCall( "CascadeWindows", uInt,0, Int,4, Int,0, Int,0, Int,0 )

BR

Added 1: there's an update waiting in the wings, maybe Cascade is about to disappear. I haven't used ExplorerPatcher or the AHK script.

Added 2: Cascade still there after update and restart - maybe it's a hemisphere thing

[BetterRed]

Originally Posted by sdrawkcab

There's no taskbar icon, it doesn't appear in Task View and there is no App process in Task Manager. There is a Background Process.

Can you post some details of the "Background Process", maybe a screenshot of Task Manager

BR

[theducks]

Originally Posted by BetterRed

Cascade windows is available on my Win10:

Windows 10 Pro, Version: 22H2, OS build: 19045.3448 Feature Experience Pack: 1000.19044.1000.0

Try Github: ExplorerPatcher:

Or AHK script: DllCall( "CascadeWindows", uInt,0, Int,4, Int,0, Int,0, Int,0 )

BR

Added 1: there's an update waiting in the wings, maybe Cascade is about to disappear. I haven't used ExplorerPatcher or the AHK script.

Added 2: Cascade still there after update and restart - maybe it's a hemisphere thing

It is on my W10 Pro (current)

[DNSB]

The last update to my Windows 10 Edu does not have Cascade Windows. Admittedly it was being a corporate managed device at that time and quite a few items were being set by policies.

[sdrawkcab]

Originally Posted by BetterRed

Can you post some details of the "Background Process", maybe a screenshot of Task Manager

BR

These images are of Task Manager:
The Apps section, identical before and after trying to run Calibre
Background Processes before trying to run
Background Processes after trying to run

[sdrawkcab]

Are we out of ideas?

[JSWolf]

Originally Posted by sdrawkcab

Are we out of ideas?

Which version of Windows and is calibre updated to the latest version? As of today, the current version is 6.28.1. If you are running WIndows 10 64-bit, it is full updated? An older version of Windows 10 will cause calibre not to run.

Stop Avast from running and then try to run calibre. If that doesn't work, boot into safe mode and try calibre again. If safe mode works, stop everything that's starts on startup and add them back in one-by-one until you find what's causing the problem.