My keyboard shortcut €œ Ctrl+A€œ (to select the entire worksheet) appears to
have been hijacked. It now results in the message box:

The macro €˜!fAboutDlg cannot be found.

It is impossible for me to trace what may have caused this.

Is there any way I can re-assign this shortcut and/or return to the default
settings?

Btw CTRL+A still works fine in Word.

Thanks for any help.