Beside the constant “You do not have permission to view this fold. Click here to have permanent permission” even with the UAC set to the lowest it can go, I have found interesting things.
Make sure you have your wireless/blue tooth tablet already powered up before starting ANY graphics program, especially Photoshop. Program just sits there doing nothing and you have to restart it.
Color schemes – they just go from bad to “WTF? Is this Windows 3.1?”
Forced updates whether you want them or not, will overwrite any customizations you may have set up. And since some of them require registry editing, make sure you have saved how you did it the first time. (This holds especially true with Surface Pro tablet. Some of the menus are so microscopic, you don’t have to be Mister Magoo to not be able to read them).
Still not a fan of the floating tile interface. Which is why with some customizations, I have it set up to a more User Friendly configuration.
Microsoft didn’t include updated camera codecs. Which is why you seen nothing but thumbnails of raw files with just Icon for RAW/CR2/NEF/ORF etc etc. Inexpensive solution is Fast Picture Viewer Codec, on sale for $9.99. Make sure you KEEP that download link handy because when there’s updates, you will reuse that link.
Also something not quite Win10 related, but system related. Don’t bother using Microsoft Windows back up making a full system image. Get EaseUS, and make an exact copy of your HDD or SSD. Should something go wrong with your drive, you just swap it out with one ready to do. Might have to contact software companies to tell them about the change of drive, and to reset or reissue your license but it will take a helluva lot less time.