using hp g60 laptop...firefox 4 seems to down just fine (tried multipile times using IE and Safari and both seems to download ok) but then as soon as installation starts get "download contains a virus deleted" error message. ..tried multiple toimes with same results...i deleted firefox 3.6 yesterday to install firefox 4.0 today now it wont install at all...help. i shuold have left firefox 3.6 alone i think but it kept telling me i was using an outdated version of firefox and telling me to upgrade.