can't download product

i have a new norton internet security product which has installed on to 2 of my laptops, however on my mainpc it says i have a 8 days remaining of a trail.....i have tried to download my new product (which was a renewal) as it says i have 1 available download left, but it cannot download as it keeps saying the following....The document you are looking for is currently unavailable. To find solutions, use the search box at the top of this page. please can someone help me????