Please can anyone shed any light on a problem we've got with email attachments? We can open attachments easily on our new Vista pc. but when we write a document on it, using Word in MS Office Home, and attach it to an outgoing email, my brother is unable to open it on his 2-year-old XP pc. It says it doesn't know what format to open the file in. His ISP is AOL and he has Word on the XP pc, which hasn't had a problem like this before. Could it be a setting on the new Vista pc that needs to be altered? Many thanks.