Recycle Bin

Normally, yes, it is gone once it has been purged from the Recycle Bin. However, unless you've defraged your drive or copied something over the sectors where that file was, by perhaps installing another program, you MAY be able to recover with Norton's Unerase Wizard. Hopefully you have Norton Utilities or can obtain a copy. Otherwise, unfortunately that file is unrecoverable.

Hope this helps!

AS JDHNV said above Nortons is probably one of your last hopes, otherwise reinstall whatever software/hardware required it and it'll be back.
For a low cost version of nortons system utilities look at 9software.com
Good luck

First try a Start --> Search --> *.PST to make sure that the file in c:\temp was not the only copy (seems strange that it would be in that location). If there is another copy of it, just run Outlook and Add the PST file back to the program by providing the proper path to it.

If you cannot find any other copy, then you can try any of the "undelete" or "file recovery" programs from www.download.com. Two things to do though:

1) Use another computer to download a undelete program and install it to a floppy disk.

2) Run the utility from the floppy disk to recover files from your c: drive.

The more you use the computer, the lesser the chance of recovering the deleted PST file.

Do NOT reinstall Outlook... it will not recover your PST file. It will just re-install the program, but no data file will be associated with it until you attach a data file to it (a PST file). If the PST file is gone, reinstalling Outlook will only make things worse.