Good new pc running windows 11. PS 23 crashed all the time, hence using the older version. No other photo app is doing this. PS never did it until I loaded 22.5.2. I've uninstalled and reinstalled twice and had a good look at settings but can't find anything.
Thanks. I had tried that without success, and was perplexed this hadn't happened on the same machine with the same software and setting earlier the same day, and doesn't happen with PSX and LR. However, I've now dug into pc display settings again and found that this version of PS doesn't seem to like HDR on my monitor. Hopefully they'll sort this out, but in the meantime I've found a workaround for the problem with the workaround.