I had my computer built by a friend of mine, and I didn't get the original xp pro disk with it. Now my Outlook is totally messed up. The Sent messages folder disappeared,( but the folder is still there full of messages) and Every message I send gets a error, but the message does send through. Without reformatting, can I un-install out look , then re-install it? ( I already tried the repair and it didn't work)