Wireless doesn't work in my room in my new computer but works on my ip

I purchased a dell 15r (N5010), and have had it for about 3 days. It is a core i3 2.27Ghz, 4Gb RAM. I did a clean install of the OS to get rid of all the bloatware. I then downloaded the respective drivers from the dell website and the resource CD that came with the laptop. After the clean OS install i started having problems with my connection. The computer will not connect to the wireless connection in my room which is very close to the router, and it will say "Windows was unable to to connect to "xxxx" The thing is that other computers in the house all work with the wireless and are farther away from the router. Also my sisters computer which is a 10.1 Asus netbook connects better to the internet than my $900 one. I can only connect to the internet when I am not in my room, but the thing is, is that even my iPhone works in my room. Also i previously had a desktop computer with a wireless adapter and it would work on my room. All the drivers are updated and theres no problems on the device manager, what could be causing this? Its really annoying me that I can't connect to the internet on my room when any computer can even my iphone or a 10.1 Asus netbook, even when I move it into my room.

Adrian said:

Follow this link and update driver for NIC: Dell - Drivers and Downloads

Thats where I downloaded the drivers from, as of now they are all up to date.

Adrian said:

Have you tried a Winsock repair?

Open command prompt, right click and run as Administrator. Type or copy/paste

netsh winsock reset

Press enter. Now reboot and see if you can connect.

Im Quoting Jacee.

Ill give it a shot, give me a second