Lightroom Classic became very slow

Report · Nov 30, 2025

I'm supporting a friend of mine with his Lightroom Classic issue. His installation became very slow after an update. Unfortunatly he can't tell which update caused it.

The issue is, that Lightroom Classic needs now 30 or more seconds to start and when switching between photos, the photo gets displayed fast but the develop dialog takes 5 to 7 seconds to get update. During this time LrC is blocked.

He is working on an Acer Aspire 5 Notebook with Intel Core i7 Series 11 CPU, Nvidia MX350 GPU, 16 GB Ram and SSD (enought space free)

So I was going through this forum and tried the following already without luck:

- Updated all drivers and Windows 11 25H2

- Disabled GPU under performance settings

- Optimized the catalog

- Increased Camera Raw Cache

- Changed Power Plan

I figured out, that in Task Manager when the program is unresponisve the process is shown with status "inactive", which led me to the Windows Resource Exhaustion Detection and Resolution service. (I had a similar issue with an old game, for what I need to disable HT in Bios to be playable).

Unfortunately his Notebook's Bios does not have the option to disable HT. As I had the similar issue with the game, I installed Lightroom Classic on my machine, where it works as expected with or without HT.

Any more ideas what I can try?

Report · Nov 30, 2025

" and SSD (enough space free)"

Please quantify that. For the hard drive the catalog is on, how large is the drive, how much free space remains? Looking for at least 20% free, some say 25% free.

"Nvidia MX350 GPU,"

A five year old GPU (at end of life) with just 2 GB of memory. While this should not effect LrC start time, it will have issues with several more advanced LrC features that use the GPU. Probably anything AI will not work.

"Changed Power Plan"

To Best Performance???

"Updated all drivers"

Including the Chip Set??? (I had an issue like that at one time)

"Increased Camera Raw Cache"

Is the CACHE clearing when LrC is closed? And have you on purpose in LrC gone in and purged it? (not normal)

Report · Dec 01, 2025

Hi GoldingD,

thanks for the reply. To your questions:

SSD - It is a 250GByte SSD with 150GByte free space.

Graphics - I agree, that the age of the GPU might be an issue but should not influence the starting of the app

Power Plan - Yes, changed it to best performance

Drivers - Actually not. Will try it next time I have access to my friend's laptop

Camera Raw Cache - Increased from I think it was 20GByte to 70Gbyte for testing. But not purged the cache. Will try it next time.

I will post the results once I was able to check these hints.