When I ck my email on my desktop with "windows mail" on a vista operating system, it causes my all of my email on my laptop with "windows live" email and windows 7 operating system to disappear.  Why does this happen and how can I fix it??  Do not like windows live mail.  I prefer the regular windows mail or  Outlook express.  However I don't think they work with windows 7.  I'm not very tech savy...please help.