hi there ,i have a computer on mobile internet with a download data limit per month. so what i have done is download the updates from http://www.symantec.com/security_response/definitions/download/detail.jsp?gid=n95 . on my home pc and then transfer to the mobile via usb stick. i was wondering if these updates just accumulate when i install them once a week or do new ones erase the previous weeks definitions ,because if they pile up it would cause a problem this weeks update being 538.7 MB in size.thanks.