I run Outlook 2007 on a Windows Vista desktop machine and it has stopped working correctly. It won't download messages for any of my accounts--when I "send and receive" the Outlook Send/Receive Progress box displays that errors occurred. (Also when I try to send a message, the message goes to the outbox and just stays there.)

I still have Web access--no problem there. And Outlook on my laptop (Windows XP, Outlook 2003) is working fine; it shares the router with the probematic desktop.

Problem started yesterday suddenly. I have replaced the pst file with the backup pst file from Sunday (my most recent backup) and that does not help.

Any advice appreciated.