Calibre won't open in Windows 10

rckmnr · 09-16-2017, 05:18 PM

I tried to open Calibre from an ebook, and it would not open. I tried several more, tried from the she shortcut on my desktop, tried from the start menu, and tried from the executable with no luck.

I uninstalled Calibre, and reinstalled with a fresh copy. I used Revo Uninstaller to remove the previous version so everything was removed. No luck.

I have no plug-ins and I turned off my anti-virus. Again, no luck.

Help!

BetterRed · 09-16-2017, 05:34 PM

If it's the 64bit edition of calibre, can you try installing the 32bit edition? The 32bit edition will use existing configuration and libraries.

The 64bit and 32 bit editions can coexist - no need to reinstall the 64bit first.

Added : which release of Windows 10

BR

JSWolf · 09-16-2017, 05:38 PM

Have you tried booting into safe mode and then running Calibre? If it then runs, something you have running at startup is the problem.

kovidgoyal · 09-16-2017, 11:53 PM

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

rckmnr · 09-17-2017, 01:37 AM

Quote:

Originally Posted by BetterRed

If it's the 64bit edition of calibre, can you try installing the 32bit edition? The 32bit edition will use existing configuration and libraries.

The 64bit and 32 bit editions can coexist - no need to reinstall the 64bit first.

Added : which release of Windows 10

BR

Maybe I'm missing something, but I installed from the msi file and there is no 32/64 bit option in installation. My OS Build is 15063.608 and my latest update was KB4038788 dated 9/12.

BetterRed · 09-17-2017, 02:02 AM

Quote:

Originally Posted by rckmnr

Maybe I'm missing something, but I installed from the msi file and there is no 32/64 bit option in installation. My OS Build is 15063.608 and my latest update was KB4038788 dated 9/12.

From where are you downloading calibre - should be https://calibre-ebook.com/download - which should look like this,

Click image for larger version

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The one in the red box is 32 bit

BR

stumped · 09-17-2017, 02:33 AM

and how did you download it- some methods will give you a file with the property" blocked" which you have to untick via right click =- properties.
Annoying little windows security "feature" - which you can get rid off, if you google ho to
If you install from a "blocked" installer i;s not going to work

https://www.howtogeek.com/70012/what...ily-remove-it/

JSWolf · 09-17-2017, 07:06 AM

I know I said this before, but you don't seem to have read.

Try safe mode.

CrazyDutchwoman · 09-17-2017, 07:36 AM

Hi there. Glad I decided to search first because I am having the exact problem. Last week nothing the matter. I was using calibre 64 a lot. Yesterday I wanted to run and my pc gave me the message that this app can't be executed on this pc (translated from Dutch)

So I tried in admin mode and will now try in safemode but I think this happened because of a windows update or so because I did nothing to have this occur. Windows 10 and I have a 64 based windows and my calibre which I can't open is 64 bit.

BetterRed · 09-17-2017, 07:51 AM

Quote:

Originally Posted by CrazyDutchwoman

Hi there. Glad I decided to search first because I am having the exact problem. Last week nothing the matter. I was using calibre 64 a lot. Yesterday I wanted to run and my pc gave me the message that this app can't be executed on this pc (translated from Dutch)

So I tried in admin mode and will now try in safemode but I think this happened because of a windows update or so because I did nothing to have this occur. Windows 10 and I have a 64 based windows and my calibre which I can't open is 64 bit.

As JSWolf suggests, try safe mode.

If that doesn't work install and try the 32bit version as per my posts - #2 & #6.

BR

CrazyDutchwoman · 09-17-2017, 07:56 AM

Quote:

Originally Posted by BetterRed

As JSWolf suggests, try safe mode.

If that doesn't work install and try the 32bit version as per my posts - #2 & #6.

BR

Thanks. I tried and it did not work. Received the same message. So I install this one in a different folder I assume? Sorry for being a pest.

Eta i see you say they can co exist.

JSWolf · 09-17-2017, 07:58 AM

Quote:

Originally Posted by BetterRed

As JSWolf suggests, try safe mode.

If that doesn't work install and try the 32bit version as per my posts - #2 & #6.

BR

If that doesn't work, installing the 32-bit version is not going to fix whatever is wrong. Whatever is wrong needs to be fixed. Trying the 32-bit version is not a good idea. Fixing the problem is a good idea.

CrazyDutchwoman · 09-17-2017, 08:04 AM

Thank you BetterRed. This helped a lot. To my surprise it all installed itself and here I thought I had to organise everything I did not. All my books are there. Have a nice Sunday.

CrazyDutchwoman · 09-17-2017, 08:06 AM

Quote:

Originally Posted by JSWolf

If that doesn't work, installing the 32-bit version is not going to fix whatever is wrong. Whatever is wrong needs to be fixed. Trying the 32-bit version is not a good idea. Fixing the problem is a good idea.

Well true but I am quite happy that I can use my calibre again. I think it has to do with a windows update because why was there no problem and then all of a sudden there was? Happy to help trying to figure out.

JSWolf · 09-17-2017, 08:08 AM

Quote:

Originally Posted by CrazyDutchwoman

Well true but I am quite happy that I can use my calibre again. I think it has to do with a windows update because why was there no problem and then all of a sudden there was? Happy to help trying to figure out.

It's not a Windows Update. I have a fully updated Windows 10 and I don't have any issue with Calibre 64-bit. It's something else. Have you tried safe mode?

Installing and using the 32-bit version instead of the 64-bit doesn't help with whatever the problem is. The problem could just end up getting worse if you don't fix it.

09-16-2017, 05:18 PM	#1
rckmnr Member Posts: 14 Karma: 10 Join Date: Sep 2017 Location: Greenwood, IN Device: PC	Calibre won't open in Windows 10 I tried to open Calibre from an ebook, and it would not open. I tried several more, tried from the she shortcut on my desktop, tried from the start menu, and tried from the executable with no luck. I uninstalled Calibre, and reinstalled with a fresh copy. I used Revo Uninstaller to remove the previous version so everything was removed. No luck. I have no plug-ins and I turned off my anti-virus. Again, no luck. Help!

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09-16-2017, 05:34 PM	#2
BetterRed null operator (he/him) Posts: 21,000 Karma: 27620706 Join Date: Mar 2012 Location: Sydney Australia Device: none	If it's the 64bit edition of calibre, can you try installing the 32bit edition? The 32bit edition will use existing configuration and libraries. The 64bit and 32 bit editions can coexist - no need to reinstall the 64bit first. Added : which release of Windows 10 BR Last edited by BetterRed; 09-16-2017 at 05:37 PM.

09-16-2017, 05:38 PM	#3
JSWolf Resident Curmudgeon Posts: 76,440 Karma: 136564696 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Have you tried booting into safe mode and then running Calibre? If it then runs, something you have running at startup is the problem.

09-16-2017, 11:53 PM	#4
kovidgoyal creator of calibre Posts: 44,551 Karma: 24495948 Join Date: Oct 2006 Location: Mumbai, India Device: Various	https://manual.calibre-ebook.com/faq...ing-on-windows

09-17-2017, 02:33 AM	#7
stumped Wizard Posts: 3,305 Karma: 10259306 Join Date: May 2016 Device: kobo forma, Kobo Libra, Huawei media Tab, fire HD10, PW3 HDX8.9,	and how did you download it- some methods will give you a file with the property" blocked" which you have to untick via right click =- properties. Annoying little windows security "feature" - which you can get rid off, if you google ho to If you install from a "blocked" installer i;s not going to work https://www.howtogeek.com/70012/what...ily-remove-it/

09-17-2017, 07:06 AM	#8
JSWolf Resident Curmudgeon Posts: 76,440 Karma: 136564696 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	I know I said this before, but you don't seem to have read. Try safe mode.

09-17-2017, 07:36 AM	#9
CrazyDutchwoman Member Posts: 13 Karma: 10 Join Date: Dec 2011 Device: Kindle 4	Hi there. Glad I decided to search first because I am having the exact problem. Last week nothing the matter. I was using calibre 64 a lot. Yesterday I wanted to run and my pc gave me the message that this app can't be executed on this pc (translated from Dutch) So I tried in admin mode and will now try in safemode but I think this happened because of a windows update or so because I did nothing to have this occur. Windows 10 and I have a 64 based windows and my calibre which I can't open is 64 bit.

09-17-2017, 08:04 AM	#13
CrazyDutchwoman Member Posts: 13 Karma: 10 Join Date: Dec 2011 Device: Kindle 4	Thank you BetterRed. This helped a lot. To my surprise it all installed itself and here I thought I had to organise everything I did not. All my books are there. Have a nice Sunday.

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