Lightroom Classic won't launch

[hughes_nz]

I can't get Lightroom Classic to launch. When I try to I get spinning wheel while the computer thinks about it for a second then nothing happens, but Lightroom Classic shows up as a Background Process in Task Manager. This only happens with Lightroom Classic, I also have Photoshop and Lightroom (not classic) and both of those work with no issue. I have tried un-installing + reinstalling including using Adobe Creative Cloud Cleaner but always with the same result (everything except Lightroom Classic works). Is anyone able to help or experienced something similar? Details below.

Creative Cloud 5.3.1.470

Lightroom Classic 10.0

Windows 10 Pro Version 20H2

[Todd Shaner · Accepted solution]

You may have a corrupt Preferences file, which does not get deleted during an uninstall. Close the Lightroom Classic instance in task manager and then hold down the ALT and SHIFT keys and click on the LrC shortcut. When prompted click Yes to reset Preferences.

EDIT: I forgot to add that the Reset Preferences prompt is a small dialougue box, which may be hidden behind other windows. If you don't see it try minimizing or closing all other open windows.

[hughes_nz]

This worked perfectly, thank you very much!

[Todd Shaner]

Glad to hear that worked. To get LrC back to the previous state you'll need to re-enter any changes you had made to LrC Preferences and reinstall any plugins you were using.

[elleove]

Hey Todd. 

I'm having the same issue but using a Mac computer, how can I solve this way?

[GoldingD]

Can you please post your own posting on this issue?

Why you ask? Because:

• Original posting a good year old, things change, solutions change
• Your OS is MACOS, original is Windows, different OS can have different resolutions
• Different version of LrC, Original posting was v10.0, sice then v10.1, 10.2, and now a major change v11. Various bugs fixed along the way, and maybe new bugs introduced

When you do post your own posting, please, please, it will be very helpful if you include more system info, following is my SOP on how to do that

______________________

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut as that is just so much dead space to us non-Techs.

[GoldingD]

1. Lock file

https://helpx.adobe.com/lightroom-classic/kb/lightroom-error-catalog-cannot-be-opened-lrcat-lock.htm...

[GoldingD]

2. Odd communication issue

Bring up your copy of Adobe Creative Cloud Desktop App. Sign out, sign in.

[robertpbrisbane]

Hi, I am having the same issues as hughs_nz, but I am on the latrest version. None of the suggested fixes below worked for me. I have signed in and out, uninstalled and reinstalled with no success. It all worked fine last week but today...very frustrating. I am using windows 10 PC.

[lloydy110]

Did you get it to work in the end?

[Lingaloo]

Hello I have a similar thing. I click on Lightroom classic shortcut and nothing happens. I've ended task in taskmaster and then tried shift and alt but no preference box appears. Needing help! Have a job to deliver by tommorrow. Thanks

[robertpbrisbane]

Hi,

Look in your lightroom folder for the latest catalogue and double click on
that. That's what I have to do now to open Lightroom.