Click Cancel in the CEPHtmlEngine.exe - No Disk dialog to exit the error window.
Photoshop encounters 'CEPHtmlEngine.exe - No Disk Error' at launch | Windows
How to resolve CEPHtmlEngine.exe - No Disk Error when opening a file in Photoshop
When you launch Photoshop on a Windows computer, a CEPHtmlEngine.exe - No Disk error dialog box opens with the message 'There is no disk in the drive. Please insert a disk into the drive D:.'
To fix the issue, do the following:
Open Registry Editor.
Press Windows + R keys or choose Start > Run. In the Run dialog, type regedit and click OK.
In Registry Editor, navigate to:
In the Edit DWORD (32-bit) Value dialog that is displayed, change the Value data field from 0 to 2.
Launch Photoshop again to work with a file.