Prior to performing the function below, I suggest you open Regedit as you
have done previously, go to File, select Export and send your reg file to
some location on your hard drive. This is a backup of your current reg file
and will allow you to quickly restore using the Regedit import function if
something goes wrong.
When you use Regedit as I suggested in my previous post, when you get to the
unread mail and you select the specific e-mail account, in the right pane,
do you see an entry called, "message count. If yes, double click it and
change the "value data" to "0" without the quotes.
If you don't see "message count," right click the appropriate e-mail
account, select "Dword value," name it MessageCount exactly as I've typed it
here and press enter. Then double click MessageCount and enter the value as
0 and see if that resolves it.