Can't launch unless I do as administrator

[adriane7]

This is my debug result from today:

C:\Windows\System32>calibre-debug -g
calibre 8.14 embedded-python: True
Windows-10-10.0.26200-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.26200')
Python 3.11.14
Windows: ('10', '10.0.26200', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre-debug.exe
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (2, 27, 1) && Package KFX (from KFX Input) (2, 27, 1) && Amazon.com Multiple Countries (1, 0, 0) && Apple Books covers (1, 1, 0) && Barnes & Noble (1, 5, 7) && Ebook Translator (2, 4, 1) && EpubCheck (0, 2, 6) && Find Duplicates (1, 10, 9) && Goodreads (1, 8, 3) && KFX metadata reader (from KFX Input) (2, 27, 1) && From KFX (2, 27, 1) && KFX Input (2, 27, 1) && Set KFX metadata (from KFX Output) (2, 18, 0) && KFX Output (2, 18, 0) && Kindle hi-res covers (0, 5, 1) && Kobo Metadata (1, 12, 0) && Modify ePub (1, 8, 7) && PDF Cover (0, 1, 0) && Quality Check (1, 14, 4) && Resize Cover (1, 2, 1) && Search The Internet (1, 11, 3) && ePub Extended Metadata {Reader} (0, 14, 2) && ePub Extended Metadata {Writer} (0, 14, 2) && ePub Extended Metadata (0, 14, 2)
QPA platform: windows
devicePixelRatio: 1.25
logicalDpi: 96.0 x 96.0
physicalDpi: 113.08521739130434 x 113.41395348837209
ApplicationPaletteChange event ignored
Using calibre Qt style: True
ApplicationPaletteChange event received
[0.00] Starting up...
[0.02] Showing splash screen...
[1.20] splash screen shown
[1.20] Initializing db...
[1.58] db initialized
[1.58] Constructing main UI...
qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile
qt.gui.imageio: libpng warning: iCCP: known incorrect sRGB profile
[4.42] GUI main window shown
[4.48] main UI initialized...
[4.48] Hiding splash screen
[4.48] splash screen hidden
[4.48] Started up in 4.48 seconds with 7303 books


Computer info:

Device name Adriane-Primary
Processor Intel(R) Core(TM) Ultra 7 155U (1.70 GHz)
Installed RAM 16.0 GB (15.4 GB usable)

System type 64-bit operating system, x64-based processor
Pen and touch Pen and touch support with 10 touch points

Edition Windows 11 Home
Version 25H2
Installed on ‎9/‎14/‎2025
OS build 26200.7171
Experience Windows Feature Experience Pack 1000.26100.265.0

This has been a problem for about 2 weeks now.

Any advice?

[theducks]

Admin indicates that your USER logon does not have access (rights) to basic directories (eg TEMP) that Calibre needs for worker tasks or the Library folder does not have the FULL rights.

I am not sure what happened to your system (I see your other MR posts with issues).
(I am sticking with W10 as what little I did work with W11, I HATED)

[JP91306]

After Installing 8.15.0 I can not open Calibre AT ALL...even as Administrator.

[adriane7]

Originally Posted by theducks

Admin indicates that your USER logon does not have access (rights) to basic directories (eg TEMP) that Calibre needs for worker tasks or the Library folder does not have the FULL rights.

I am not sure what happened to your system (I see your other MR posts with issues).
(I am sticking with W10 as what little I did work with W11, I HATED)

Trying to open without admin, I checked properties, I own the program. I've checked the permissions, no issues. I'm going to do fresh install of Windows, this new laptop of mine has been having lots of issues, only 2 months old. Very frustrated.

[Sirtel]

It's not Windows 11. I upgraded (or downgraded, depending on your viewpoint ) both my computers from Windows 10 to 11 this summer without any issues. I also didn't like Win 11 much, but with ExplorerPatcher set to imitate Windows 10 taskbar, start menu and other things it's tolerable. True, I don't have any peripherals requiring older drivers. Everything I have works with Windows 11.

[theducks]

Originally Posted by adriane7

Trying to open without admin, I checked properties, I own the program. I've checked the permissions, no issues. I'm going to do fresh install of Windows, this new laptop of mine has been having lots of issues, only 2 months old. Very frustrated.

You need full permission to use temp and other FOLDERS, Not just to execute Calibre. Something is really broken on YOUR system as ther are THOUSANDS of Calibre 8.14 users