Yesterday night I was painting a picture on Photoshop, and I saved then closed my laptop to go to bed. Today I tried to open the file again, but it said that Photoshop could not complete my request due to it being an invalid document. I am both shocked and sad by this event because I don't know how to fix it, It will not open with programs such as paint and I've checked the properties and everything seems fine. Someone please help! I don't know what to do :C
You may have saved the file with the wrong extension. (saved a PSD, but with a .tif extension for example.) If this is the case, you should just be able to rename the file with the extension of the format the file was actually saved as and it will open okay.