rename the file to another extension. ie - change it from applicationname.exe to applicationname.old or something.
hotmail blocks .exe files as alot of virus or malicious programs are run as .exe's.
just right click the file in question and Rename.
Make sure you can see the file extension, otherwise it will only rename the file and not the extension.
Open Windows Explorer and go to Tools, Folder Options, View and UNTICK Hide extensions for known file types....
hey presto!