Vista - Windows Mail inbox opens on its own. I close it and it opens again!

I have had my computer for quite awhile now over a year and about 5 days ago while playing Diablo 2 my game minimized because windows mail inbox popped up. I thought to myself thats wierd and closed it and went back to my game it came back up about 2 seconds later. I continue to have this problem 5 days later after running every free version of virus software i can think of (none of which find anything) I have googled the problem about 500 times and found only one post that was on this site that is more than 128 days old so i cant reply to it and the orignal poster did not bother to tell if he found a fix for the problem! I found a link to block the program but when i used it that just made the problem worse and it seemed to make it try to access itself even more than before.
Please god someone help me!

Another round of virus scans. Another let down. Ive tried. AVG.. Bit Defender. Super Anit Spyware. Avast. None of them found anything. I see 25 people have stoped to look but since noone replies im guessing noone else has any idea how to fix this problem. I really dont want a F'ing Mac but vista sux!