Photoshop and Lightroom are experiencing errors. Until yesterday, there were no issues. Is there anything suspicious that could be causing this? Like a Windows update, perhaps?
Are there others experiencing the same symptoms as me?
How much RAM and spare hard disk capacity do you have?
Have you tried resetting the Photoshop preferences back to the factory defaults, which you can do under the General tab in Photoshop preferences (then closing and reopening the application)?