@Geoff277677858p36 Apologies - the 2nd link has a spurious / on the end
it should be https://helpx.adobe.com/photoshop/kb/basic-trouble-shooting-steps.html
Next:
Perhaps try a thorough reset of Photoshop preferences?
(read this entire post before acting please)
Resetting restores Photoshop's internal preferences, which are saved when Photoshop closes.
If they become corrupt then various issues can occur.
Here’s some info on how to do that:
Manually removing preferences files is the most complete method for restoring Photoshop to its default state:
Manually removing preferences files is the most complete method for restoring Photoshop to its default state. This method ensures all preferences and any user presets which may be causing a problem are not loaded.
1.Quit Photoshop.
2.Navigate to Photoshop's Preferences folder.
macOS: Users/[user name]/Library/Preferences/Adobe Photoshop [version] Settings
Windows: Users/[user name]/AppData/Roaming/Adobe/Adobe Photoshop [version]/Adobe Photoshop [version] Settings
Note: The user Library folder is hidden by default on macOS. To access files in the hidden user Library folder, see How to access hidden user library files.
3.Drag the entire Adobe Photoshop [Version] Settings folder to the desktop or somewhere safe for a back-up of your settings
5.Open Photoshop.
New preferences files will be created in their original location.
Note re macOS: The user Library folder is hidden by default.
To access files in the hidden user Library folder, see here for how to access hidden user library files.
Unexpected behaviour may indicate damaged preferences. Restoring preferences to their default settings is a good idea when trying to troubleshoot unexpected behaviours in Photoshop. check out the video
Learn how to access and modify Photoshop preferences and customise per your frequent workflows
And here’s an earlier forum discussion as an aid to understanding
You may want to backup your settings and custom presets, brushes & actions before restoring Photoshop's preferences.
Before you reset your preferences
in case of future issues, I suggest you make a copy as Adobe may need one to check problematic references.
Quit Photoshop.
Go to Photoshop's Preferences folder
[on MacOS see: Users/[user name]/Library/Preferences/Adobe Photoshop [version] Settings
Note for those on macOS: - be aware that the user Library folder is hidden by default on macOS.
In the Finder, open the “Go” menu whilst holding down the Option (Alt) key.
Library will now appear in the list - below the current user's “home” directory. ]
Now you can drag the entire Adobe Photoshop [Version] Settings folder to the desktop or somewhere safe as a back-up of your settings.
Note for those on macOS:
Preference preservation is affected by macOS permissions,
you’ll need to allow Photoshop ‘Full Disk Access’ in your Mac OS Preferences/Security and Privacy
If that doesn't fix the issue:
Go to Preferences > Performance... and uncheck Multithreaded Compositing - and restart Photoshop.
Still hanging?
Go to Preferences > Performance... click Advanced Settings... and uncheck "GPU Compositing" - then restart Photoshop.
Do you still have problems?
It may even be time to reinstall Photoshop.
It’s recommended that you use the Adobe CC cleaner tool to remove all traces first.
(See above about preserving preferences though! It’s worth preserving them unless they are corrupted.)
Uninstall Photoshop BUT make sure to choose the option “Yes, remove app preference”.
Once that process finishes, start the installation process and look into the “Advanced Options”. Uncheck “Import previous settings and preferences” and choose to “Remove old versions”.
I hope this helps
neil barstow, colourmanagement net :: adobe forum volunteer
google me "neil barstow colourmanagement" for lots of free articles on colour management
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