Dear Roady,
thank you for your reply.
Unfortunately, the Microsoft Outlook Repair Tool failed.
I went to Windows 7 64-bit PC\Start\Computer\C:\Program Files\Microsoft Office\Office14\SCANPST\Browse...\selected the Outlook Data File\Open\Start
Error prompt came up:
Microsoft Outlook Inbox Repair Tool
The file C:\Users\<name>\Documents\<faulty inbox.pst> is read-only. You can scan this file but you do not have permission to repair it. Do you want to scan the file anyway?
Yes\Repair
Error prompt came up:
Microsoft Outlook Repair Tool
The file C:\Users\<name>\Documents\<faulty inbox.bak> is read-only. You do not have permission to overwrite it.
OK
The inbox still has the issue.
Please urgently assist further.