I googled this but did not find anything. I have not used Win7 at all, and my neighbor wants me to upgrade his rig from Vista to 7. He uses Windows mail. I know that Win7 does not come with a mail client, but when you upgrade from Vista to Win7 will it leave the existing windows Mail client alone (as in not remove it). Anything else I should be aware of that might cause grief? He is a basic computer user and does not have anything fancy on his computer. Thanks.