I have windows XP . Yahoo email , When I try to open a attachment (.xls ) I can not read it .What do I have to do to unfrag. It ? (Guardian Industries )

Do you have Excel installed on that computer?

Thanks. I went to - http:office.microsoft .com/ Then - excel viewer - Download . Now I read the file . I don't know what's next but it works for now .

Nothing's next. Keep using the viewer to view only, or install your own copy of Excel if you ever want to edit/create your own.

Thanks. What is the beat way to install a copy of Excel ?

Buy it from Microsoft or a Microsoft certified retailer.