Calibre doesn't start up after update - recurring problem

Preda · 04-25-2022, 02:38 PM

Over the past few months I have run into the problem of Calibre not starting up, either before updating or, in this latest episode, after updating it. It was working fine, I started it up and got the update notification. I updated it, hit the "Later" option for restart and then try to open up the software; the Windows hourglass appears near my cursor for a split second then nothing happens. I restarted the PC, and the same thing happens. I re-run the installer and chose the "Repair" option with no effect.

I don't remember how previous episodes of this bug were solved; one time at least I just re-ran the installer. Do I have to do that every time this happens? I would really prefer to understand WHY it's happening so I can avoid it. I open the Calibre software infrequently but I have a very significant library that I don't want to lose access to under any circumstances, and right now neither the ebook reader nor the collection manager software are starting up.

This bug has been happening in the last year of updates, I didn't use to have this problem. I've always been very satisfied with Calibre.

I'm running Windows 10.

ownedbycats · 04-25-2022, 02:54 PM

If you're getting a prompt to restart, that means Calibre isn't closed, which I'd suspect to be part of the issue. my Calibre sometimes glitches out and fails to load if I forget to close it before updating (easy to do when you minimize to tray).

Usually running the installer again and using 'repair' will fix it. Make sure to do it after a reboot though.

Broedertje · 05-04-2022, 06:39 AM

Today I had the same problem. Somebody in an another thread mentioned to update the display driver, this did the trick for me.

04-25-2022, 02:38 PM	#1
Preda Junior Member Posts: 1 Karma: 10 Join Date: Apr 2022 Device: Pocketbook reader	Calibre doesn't start up after update - recurring problem Over the past few months I have run into the problem of Calibre not starting up, either before updating or, in this latest episode, after updating it. It was working fine, I started it up and got the update notification. I updated it, hit the "Later" option for restart and then try to open up the software; the Windows hourglass appears near my cursor for a split second then nothing happens. I restarted the PC, and the same thing happens. I re-run the installer and chose the "Repair" option with no effect. I don't remember how previous episodes of this bug were solved; one time at least I just re-ran the installer. Do I have to do that every time this happens? I would really prefer to understand WHY it's happening so I can avoid it. I open the Calibre software infrequently but I have a very significant library that I don't want to lose access to under any circumstances, and right now neither the ebook reader nor the collection manager software are starting up. This bug has been happening in the last year of updates, I didn't use to have this problem. I've always been very satisfied with Calibre. I'm running Windows 10.

04-25-2022, 02:54 PM	#2
ownedbycats Custom User Title Posts: 10,970 Karma: 75337983 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	If you're getting a prompt to restart, that means Calibre isn't closed, which I'd suspect to be part of the issue. my Calibre sometimes glitches out and fails to load if I forget to close it before updating (easy to do when you minimize to tray). Usually running the installer again and using 'repair' will fix it. Make sure to do it after a reboot though. Last edited by ownedbycats; 04-25-2022 at 02:56 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Calibre 4.20 doesn't start after update - Linux Mint 17.3	leelo12345	Devices	7	10-19-2019 01:28 PM
Calibre doesn't start	FuzzyDog	Calibre	4	08-26-2018 03:28 AM
Server doesn't start after update to 3.27.1 - python libs missing	Lakrimar	Server	6	07-08-2018 08:58 AM
Calibre-server doesn't update books list without stop/start service	gonzalo.cao	Calibre	2	07-12-2017 08:34 AM
Calibre doesn't start	slothrop	Calibre	1	12-14-2009 09:23 PM

05-04-2022, 06:39 AM	#3
Broedertje Junior Member Posts: 3 Karma: 10 Join Date: Feb 2022 Device: Kobo H2O	Today I had the same problem. Somebody in an another thread mentioned to update the display driver, this did the trick for me.

Advert