I work as a freelance illustrator and found today while trying to start up photoshop depite my best efforts it didn't seem to go beyond the blue loading circle, which is problematic considering my income relies on being able to actually draw.
So far I've tried every fix in the book for Windows 10 over the past 8 hours, reset my Surface Pro, Redownloaded the app in every single available version, used the CC Clearner 3 times, deleted every existing adobe file off my computer then redownloaded it, given photoshop administrator access, cleaned all recordings of Adobe from my Task Manager. E V E R Y T H I N G, and not a single thing has worked.
Now I know it's not my software/hardware since the app was running beyond perfectly yesterday, just the second I opened it up today it hasn't worked at all. I'm simply just beginning to believe that either some unruly higher being has decided to smite with a big F U, or that there's something fricky going on on Adobe's end that's messing with my ability to work.
If Photoshop use to open. Try renaming your user ID Photoshop Preference folder. When you start Photoshop it will build a new one for your user id with Adobe defaults. See if Photoshop open then something may be corrupt in your current preferences.