ERROR: "Could not open a scratch file because the file is locked"

Method 1:

• Run Photoshop as Administrator

Method 2:

• while Photoshop opens hold down Ctrl+Alt to open the Cratch Disk Preferences (PS: you have to be quick, before it opens)

Method 3:

• while Photoshop opens hold down Ctrl+Alt+Shift to delete the preferences file (PS: you have to be quick, before it opens)

Method 4:

• set the user and system environment variables %TEMP% and %TMP% to point to a custom folder (like C:\Temp)