If I open two files and copy and paste from one to the other (any format, psd or jpg) - photoshop crashes. I am currently installing a previous version from Creative Cloud, ditching V24whatever. Garbage.
Got same issues, but with saving multiple files. When i open more than 3 files, change layer visibility, save and close one of the files - photoshop crashes. Tried reinstalling, updated drivers, ran memory check - nothing worked. Now try to install previous version too. (