Click Cancel in the CEPHtmlEngine.exe - No Disk dialog to exit the error window.
How to resolve CEPHtmlEngine.exe - No Disk Error when opening a file in Photoshop
Issue
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:.'

Operating system
Windows
Workaround
To fix the issue, do the following:
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Open Registry Editor.
Press Windows + R keys or choose Start > Run. In the Run dialog, type regedit and click OK.
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In Registry Editor, navigate to:
Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Windows -
Double-click ErrorMode.
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In the Edit DWORD (32-bit) Value dialog that is displayed, change the Value data field from 0 to 2.
The Edit DWORD (32-bit) Value dialog box -
Launch Photoshop again to work with a file.
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