How long will this laptop last me?

I was wondering how long the Hp Envy DV6T 7300 quad core edition laptop would last me. Here is a link to the amazon page in order to view the specs and partially the build quality.http://www.amazon.com/gp/product/B00BAEOFUG?ie=UTF8&force-full-site=1&ref_=aw_bottom_links
The laptops specs seem to have everything I would need, the laptop has good reviews, and it's very nice looking too! I know it all depends on the user for how log the laptop lasts, so I'm going to tell you how I treated my last laptop and you can hopefully make estimates from that. I will be using a laptop cooling fan that will also prop my laptop off the ground, allowing the air to circulate more. I also plan on learning how to clean the laptops internal cooling fan. I will use to laptop for light to medium gaming. Halo CE will be the most demanding game I run… Lol. I will also be watching movies, downloading a lot of programs and apps, and surfing the web. (Social networking, news, etc.) physical damage wise, I'm very careful with my laptops and electronics. For example, I still have an iphone 3Gs from when it first came out and it works like new and has NO scratches lol. Use it every day. Lastly, I plan on using this laptop 1-3 hours everyday but will use it double that amount on weekends. I also plan to try and run a virus scan etc weekly. Thanks. ANY reply would be GREATLY appriciated as this is my first laptop purchase.

I would guess 3 to 4 years.