Help - Calibre installation failed

SUSGOD · 08-27-2021, 11:53 AM

I use Windows 7 and tried to update my old Calibre as directed on the website. "Simply un-install calibre and install 3.48...which works with all Windows 7/Vista machines, from here." Foolishly, I uninstalled the old, then downloaded the new, which failed to install:
"This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package."
There is no email address or link on the Calibre website to contact Calibre. How do I get Calibre back on my Windows 7?

Susan

theducks · 08-27-2021, 12:20 PM

Is your W7 machine 32bit? (and you downloaded 64bit)

Did you try and disable your Anti-virus (only while downloading from the official site). (I have never had Defender Mess with a downloaded file)
There is an official help FAQ that might have additional tips

SUSGOD · 08-27-2021, 08:35 PM

I run Windows 7 Professional Version 64 bit on a Think Center M93p Tower. I do not want to upgrade to Windows 10. I tried both 64 bit and 32 bit and received the same message. I do not have Defender, but I disabled my anti-virus and retried to install without success. I just successfully installed the portable version of Calibre, so that should work for my limited needs.

I don't know why the portable version will install, but not the full version.
Thank you for your help.

Susan

Quote:

Originally Posted by theducks

Is your W7 machine 32bit? (and you downloaded 64bit)

Did you try and disable your Anti-virus (only while downloading from the official site). (I have never had Defender Mess with a downloaded file)
There is an official help FAQ that might have additional tips

kovidgoyal · 08-27-2021, 09:28 PM

Just use the portable version, it works the same. Instead of running calibre-portable.exe run calibre.exe instead from inside the portable installation folder.

08-27-2021, 11:53 AM	#1
SUSGOD Connoisseur Posts: 84 Karma: 21 Join Date: Mar 2007 Location: NJ Device: Aluratek Libre-eBook reader PRO	Help - Calibre installation failed I use Windows 7 and tried to update my old Calibre as directed on the website. "Simply un-install calibre and install 3.48...which works with all Windows 7/Vista machines, from here." Foolishly, I uninstalled the old, then downloaded the new, which failed to install: "This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package." There is no email address or link on the Calibre website to contact Calibre. How do I get Calibre back on my Windows 7? Susan

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08-27-2021, 12:20 PM	#2
theducks Well trained by Cats Posts: 29,838 Karma: 54837878 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Is your W7 machine 32bit? (and you downloaded 64bit) Did you try and disable your Anti-virus (only while downloading from the official site). (I have never had Defender Mess with a downloaded file) There is an official help FAQ that might have additional tips

08-27-2021, 09:28 PM	#4
kovidgoyal creator of calibre Posts: 43,903 Karma: 22666668 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Just use the portable version, it works the same. Instead of running calibre-portable.exe run calibre.exe instead from inside the portable installation folder.

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