I don't know why you're getting so much spam, but your experience is totally opposite from mine because I never get spam at my Gmail account. If you've ever posted your email address in a public forum or other place, that could account for it. Windows Live Mail and Gmail are totally different things though. Gmail is an email service and Windows Live Mail is not. It's an email client for accessing a service like Gmail. It does have built in spam filters, but they're far form perfect.
Having tried all the browsers, I have chosen to stick with Internet Explorer, I have tried Crome and do not like it particularly this missing option to create a desktop shortcut. However, the only Google product I use, is gmail. I was attracted to it because of the storage capacity. But, this email program generates more SPAM than any other. I am getting up to 50 spam messages a day and am constantly applying filters to stop them, but they still keep coming. The only reason for this must be they are giving my email address to these spammers. I will now save all my important messages and go back to windows live mail which appears to be much safer.