Windows of any kind is insecure at the best of times and terrible at the worst. You always need AV and Spy Ware products running on your System to prevent Data Loss through infection.
So update your AV Product and if you don't have one download AVG Free from here
http://tinyurl.com/6ycuxv
While you are on Line download Adaware 2007 free
http://tinyurl.com/yqv99n
And Spy Bot S&D from here
http://tinyurl.com/yrwy2
Install these and update them then reboot in [b]Safe Mode without networking[/b] and scan the system with all the listed products. Of course if you have a working AV Product use that after making sure that it is updated.
Scan the system first with the AV product and clean it up and then rescan to make sure that the system is clear. If it still shows an infection post back with the Description.
Then after the system is Cleared by the AV Product scan it with Adaware & Spy Bot using each till the system is either Clean or you are unable to remove the files that come up. With Spy Bot it can pickup some M$ Files and report them as Problem Files so look at what is shown and if you are using some file remove the tick from the box beside it so it is not deleted.
When the system comes up as clean try Importing your Deleted Items DBX File again but this needs to be imported from a different place to the Storage Position as that is where Outlook is accessing it. If the folder is still empty the contents may be lost or your existing AV Product could have been compromised by a Infection and disabled.
Col