Wayne wrote:

So glad i found this grooup. I have a problem thats been driving me
crazy. I have a new computer that had Vista OS on it and i chnaged
back to XP cause i disliked Vista.

I had Outllok 2007 on the Vista and i burnt the pst file to a cd
before i deleted Vista and installed XP.

Then i re installed XP on the XP OS and am trying to re
import/install the pst file from cd and Outlook keeps telling me its
not a valid pst file.

Chances are, then, that the PST is toast. While Diane's idea is worth
trying, I suspect it won't work. In the majority of cases I've seen, if
Outlook says the file is not a PST, then so will SCANPST. The most common
cause is that Outlook was open when the copy of the PST was made. There is
substantial anecdotal evidence, as well, that some CD burning software
doesn't handle PSTs well and corrupts them when they're burned.
--
Brian Tillman [MVP-Outlook]