Calibre versions > 3 don't start

[spamalamaham]

I decided to finally update my calibre (ver 3.xx) to the latest (7.22) and found it does not start. I considered that it may be jumping to many versions so I tried 6xx, 5xx, 4xx without any improvement. Uninstalling and going back to 3.48 is the furthest I can go that opens.

Debug on 4.0 shows:
calibre 4.0 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19041')
Python 2.7.16+
Windows: ('10', '10.0.19041', 'SP0', u'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: DeDRM (6, 6, 3)
Turning on automatic hidpi scaling
Registering with default programs...
Registered with default programs in 0.7 seconds


3.48 running no problem gives:
calibre 3.48 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.19041-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19041')
Python 2.7.15+
Windows: ('10', '10.0.19041', 'SP0', u'Multiprocessor Free')
Interface language: None
Successfully initialized third party plugins: DeDRM (6, 6, 3)
Turning on automatic hidpi scaling
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 93.9653179191 x 94.0740740741
Using calibre Qt style: True
[0.00] Starting up...
[0.00] Showing splash screen...
[0.09] splash screen shown
[0.09] Initializing db...
[0.19] db initialized
[0.19] Constructing main UI...
[1.05] main UI initialized...
[1.05] Hiding splash screen
[1.42] splash screen hidden
[1.42] Started up in 1.42 seconds with 1679 books

Thanks in advance!

[kovidgoyal]

Try rebooting in safe mode and see if it works.

[DNSB]

You might want to install a few Windows updates. 19041 was the 20H1 release which is well out of date.

[spamalamaham]

Originally Posted by DNSB

You might want to install a few Windows updates. 19041 was the 20H1 release which is well out of date.

When I look at my windows spec it shows:
Edition Windows 10 Home
Version 22H2
Installed on ‎8/‎13/‎2023
OS build 19045.5247
Experience Windows Feature Experience Pack 1000.19060.1000.0

Could this discrepancy be causing this issue?

[JSWolf]

Originally Posted by spamalamaham

When I look at my windows spec it shows:
Edition Windows 10 Home
Version 22H2
Installed on ‎8/‎13/‎2023
OS build 19045.5247
Experience Windows Feature Experience Pack 1000.19060.1000.0

Could this discrepancy be causing this issue?

Try seeing if there are any Windows Updates available. You do have some sort of discrepancy.

[BetterRed]

Originally Posted by spamalamaham

When I look at my windows spec it shows:
Edition Windows 10 Home
Version 22H2
Installed on ‎8/‎13/‎2023
OS build 19045.5247
Experience Windows Feature Experience Pack 1000.19060.1000.0

Could this discrepancy be causing this issue?

I see exactly the same, apart from date installed.

Edition Windows 10 Pro
Version 22H2
Installed on ‎2022-‎02-‎19
OS build 19045.5247
Experience Windows Feature Experience Pack 1000.19060.1000.0

And when I run calibre debug I get

. . .
calibre 7.22 embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.11.5
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
. . .

So, no discrepancy here. I'm up to date with Windows (just checked).

If the OP is also up to date and all else fails, I suggest they try a sfc -scannow, I have known it to fix issues related to the "Trusted Installer" etc.

BR

[spamalamaham]

I seem to have solved the issue. I had APU drivers and dedicated GPU drivers installed at same time. Uninstalled both, then installed just dedicated and now able to run 7.22. Thanks for everyone's help!