Lightroom Classic 12.1 does not launch on Windows 11.

[lisah92978143]

I've been using Lightroom Classic for many years so am pretty familiar with how it works, but I am beside myself with frustration today. Though I do use LR mobile and desktop for much of my workflow, I depend upon many of the features in LR Classic that aren't available in the other apps. 

I'm using LR Classic version 12.2.1 on Windows 11.  Last week it stopped launching.  Task Manger shows it running as a background process, but the app doesn't launch.  After following suggustions found in other threads and trying them ALL, the only thing I've found to work consistenly is to open a new windows user account.  It works the first time, but it still refuses to open again after that initial launch.  This is obviously not a managable solution.  Any and all help is appreciated. 

Device Specs:

Device name LH-PersonalDellLaptop
Processor Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz 2.59 GHz
Installed RAM 16.0 GB (15.7 GB usable)
Device ID EF33E430-072B-4F26-B6B7-C739470E18E0
Product ID 00325-82131-84812-AAOEM
System type 64-bit operating system, x64-based processor
Pen and touch Pen and touch support with 10 touch points

Windows Specs:

Edition Windows 11 Home
Version 22H2
Installed on ‎3/‎13/‎2023
OS build 22621.1413
Experience Windows Feature Experience Pack 1000.22639.1000.0

[JB_FFM]

I tried Windows step 3 (delete temp data) and it did NOT help.

However I experience the same behaviour. LR classic does start if you give it very very much time.

So what is the issue? Anybody any help?

Thanks.

[GoldingD]

I tried Windows step 3 (delete temp data) and it did NOT help.

However I experience the same behaviour. LR classic does start if you give it very very much time.

So what is the issue? Anybody any help?

Thanks.

By @JB_FFM

Did you look at the other solutions in the linked document?

[lisah92978143]

Yep. I've done them all multiple times. Seems to launch eventually after waiting about 30 mins. It will the launch normally on subsequent attempts, but after doing  a backup, it starts all over with having to wait a crazy amount of time. 

[Chris Delle]

Yeah if I leave it running in task manager it eventually fires up (like 30 min later) but is very slow

[wilhelmv64]

Mine also started after around 30 minutes and is performing stable and reasonanly fast.  Have not doen a back-up yet.

[Wurstkrapfen]

Maybe similar issue here, it just took a really long while (double digits minutes) and then eventually opened.

After 2 days it fixed itself.

[GoldingD]

Update

A specific CACHE file may be at fault:

Mac: /Users/<username>/Library/Caches/Adobe/Lightroom/metrics.json

Win: C:\Users\<username>\AppData\Local\Adobe\Lightroom\Caches\metrics.json 

see : https://www.lightroomqueen.com/community/threads/lrc-cache-causing-crash-metrics-json-but-why.47409/

[Joseph381661638j4v]

Use the Creative Cloud Cleaner tool to solve installation problems (adobe.com)

I tried all the suggestions in this thread and was about to start using another program when I came across this link.  I followed the instructions to completely remove Creative Cloud and Lightroom.  After a reinstall, I loaded a backup Lightroom catalog and was back in business.