With all the malware and the fact that Microsoft never resolved the "corrupt profile" problems it means that we must keep backups of what we can't lose as well as be ready to reinstall apps. For the time being "not much" has happened for computers to be things we can use without backups.
First things first. Search for the PST file and copy it to a safe place. Then uninstall and reinstall Office. In a stock install with no malware or infections this will not result in any file loss but given today's malware you only lose what you don't backup.
If Outlook is working again you can exit outlook and copy the old PST to the location outlook is expecting it.
Bob
My daugter is running 32 bit Office 2007 Enterprise Edition on her 64 bit Windows 7 Toshiba Satellite R850-IOH PC. It had been running well since installation about five months ago until she recently found that Outlook would not start - instead there was an error message saying "Outlook.pst file cannot be found"
The Outlook icon in her Documents folder firstly multiplied to about six copies and then disappeared completely. The icon is still on the task bar at the bottom of the desktop, but when clicked it comes up with the above error message.
Is this a known problem - could it be a virus? If we reinstall Office 2007, is it likely to happen again?

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