Thanks for your help.

Windows version?

Vista Ultimate

If you disable the Preview pane (View Current layout), can you delete the
message?

No, I can not

Do you have tens of thousands of messages in your Inbox?

I have about 200 e-mails in the main folder and 3000 in subfolders

Have you ever compacted all OE folders?

I tried to do it today but it stopped in 80% and nothing appeared in folder
c:\Users\Peter\AppData\Loca\Microsoft\Windows Mail\Compact

Is Outlook 2007 installed on the machine or another machine?

Outlook is on the same computer.

I have another problem with OE - when I create a new message I can not open
the contact list (but Tools-Windows contats works fine).

So mayby MSMessageStore is corrupted and I have to reinstall OE?

--
Peter