Is the Lightroom version on the laptop 2015.5 and on your desktop 2015.6 by any chance? The very latest 2015.6 version has memory leaks for some people that can lead to this phenomenon. It's possible to revert to 2015.5 on your desktop if you want to check whether this is the issue. Use the instructions here, but instead of the LR 2015.1.1 update install the LR 2015.5.1 update.
thanks for your help Jao. The computers are running the same version 2015.6. Unfortunately I cant change my version via that method. As I have a subscription not a standalone version of lightroom. I tried but it wouldn't let me. Its quite strange, its using almost 3-4 gig of ram with the develop module open, with nothing else happening. is there any other way to revert back.
again thanks for the help
Lightroom version: CC 2015.6 [ 1078672 ]
License: Creative Cloud
Operating system: Windows 10
Application architecture: x64
System architecture: x64
Logical processor count: 8
Processor speed: 3.3 GHz
Built-in memory: 16364.3 MB
Real memory available to Lightroom: 16364.3 MB
Real memory used by Lightroom: 10222.2 MB (62.4%)
Virtual memory used by Lightroom: 10722.1 MB
Memory cache size: 1415.6 MB
Maximum thread count used by Camera Raw: 8
Camera Raw SIMD optimization: SSE2,AVX
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Displays: 1) 2560x1440
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No
Graphics Processor Info:
GeForce GT 530/PCIe/SSE2
Check OpenGL support: Passed
Vendor: NVIDIA Corporation
Version: 3.3.0 NVIDIA 353.82
Renderer: GeForce GT 530/PCIe/SSE2
LanguageVersion: 3.30 NVIDIA via Cg compiler
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You can do it through that method for both CC and standalone. The trick is that you first have to uninstall Lightroom from the CC app (the gear icon next to the app in the creative cloud app. This will not delete your catalog. In your memory stats up there it seems that Lightroom is using 10 GB of memory which is quite excessive so it could well be this issue. It is very system dependent whether this problem shows up or not. I haven't seen it myself but lots of people have reported runaway memory use related problems here.
1 person found this helpful
Specific instructions to revert back
Follow these instructions (where it says Lightroom 6.1.1/Lightroom CC 2015.1.1 pretend it says Lightroom 6.5.1/Lightroom CC 2015.5.1)
will try again guys, thanks for your help. Was skipping step 2 (download version .0 first
Success guys. No more crashing. Still uses an awful lot of ram though. I ran lightroon on the original install and it never exceeded half a gig of ram with the develop module open. i then installed the update and it was up to 3 gig.
Anyways thanks for your help, it is much appreciated. I suspect that it may be an issue light room is having an issue with windows 10. The laptop which is on 7 dosn't have any of the issues and consumes much less ram performing the same tasks
Again thanks Dom
looks like I spoke to soon, went to export a time lapse sequence, approx. 20 photos in of 350 it ran out of memory, and pc locked up. Will go back to original install and run without any updates, if that doesn't work, back to cs6.
Please update Lightroom to 6.9/2015.9 version which includes the fix for Lightroom: Erroneous warning message on Catalog Backup | Photoshop Family Customer Community