My 4GB+ PS file won't compact!

All the other (smaller) PST files compact without a problem, but this one won't -- even after I totally close out of Outlook and restart the computer and try to compact via the Control Panel / Mail / Data.  It gives me the option to compact, but then, when I click, just gices up after a couple of seconds.
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It sounds like there is some sort of corruption in the file.   Can you export only the folders you care about to a brand new file?      (ie:  Don't export the Deleted Items, Sent Items if you don't care about them)
Search for the file scanpst.exe on your computer.  It is usually in your Outlook application files.

Run this utility on the PST file to fix any corrupted emails or folders in the file.  You should be able to compress after that.

If you receive an error such as:

- .pst cannot be accessed - 0x80040116 (when you open PST file)
- Task 'Microsoft Exchange Server - Receiving' reported error (0x8004060C): 'Unknown Error 0x8004060C'. (when you try to add new item to pst file)
- Task 'Microsoft Exchange Server' reported error (0x00040820):'Errors in background synchronization.

Then your PST size limit is not supported.  This can happen at 2GB or at 4GB in later versions of Outlook.  If this is the case, import the .PST into Outlook 2010 or later, and export into smaller PST files.
AndyUsedToBeSmartAuthor Commented:
The sysinfotools $79 software did make my file smaller -- but then apparently reset something so that Outlook downloaded nearly 60,000 messages I had already read or deleted -- now al marked unread again -- and the file is back over 5Gigs.

Not your fault . . . I'll get there eventually.
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