The problem may be a corrupt dbx file.
This isn't an OE group but have you tried a search engine? Here's one
result.
http://www.soft411.com/software/outlook-dbx.html
from the top of the list of search engine results.
As said this isn't the place for an OS discussion but here is some info for
you:
I have a couple of extraction programs I use to extract the mails from OE
even from damaged dbx files. The storage files can get rather large over
time even when no messages are left in them- for OE it is worthwhile moving
all of the messages out of the inbox to another folder then closing OE and
deleting the inbox.dbx file. It can get rather large and corrupted over
time. The file is recreated on next program startup. Look at the size of
your empty inbox.dbx before deletion after moving your messages out and
compare it to the size of the newly created file.
I haven't looked through the results of that particular link, apart from
that you can try a couple of other things- a web search, or ask at the OE
newsgroup.
It is worth going to the OE newsgroup and asking there- OE is completely
different to Outlook so this is not really the place to ask your question.
good Luck