Limited Access to network

Hi,
I'm writing today because recently I've been getting the issue of the "Limited Access" when it comes to connecting to the internet at my school. I know it's something wrong with my laptop because every single person that is in the same area as me is receiving internet just fine, for some reason it's only me. At home I connect to my router with no problem it's only in school. Sometimes it does actually connect but when I come back the next day it's back to "Limited Access". I usually just restart my network adapter and at times I re-install my wireless card. I obviously cannot access the router so I would appreciate if someone can give me a solution in which I would not have to. Been searching all over the internet for a solution but most of them just say to access the router and input some stuff...Please help. Thanks!

Oh and I'm running Windows 7 x64
Dell XPS 17

Thank you karlsnooks for responding. I had to keep uninstalling my Wireless adapter driver in until it finally worked. If I go back to school tomorrow it will say limited access again. I'm looking for permanent solutions not quick fixes.

My specs are as follows:

OS
MS Windows 7 Home Premium 64-bit SP1

MS Windows 7 Home Premium 64-bit SP1
CPU
Intel Core i7 @ 2.00GHz
Sandy Bridge 32nm Technology
RAM
6.00 GB Dual-Channel DDR3 @ 665MHz (9-9-9-24)
Motherboard
Dell Inc. 0K4H3G (CPU)
Graphics
Generic PnP Monitor (1600x900@60Hz)
(Illegal Vendor ID)
Hard Drives
488GB Seagate ST9500420AS (SATA)
Optical Drives
Optiarc DVDRWBD BC-5540H
Audio
Realtek High Definition Audio
It's a laptop

Also, there are no wifi hotspots around the area from what I know. Just a whole bunch of clothing departments.

I did

Im at a college campus..it's deep in the forest so the only wifi around are local wifi which pretty much have passwords. To reach a hotspot I would have to drive outside the school which I dont have the power to do.

Search NYIT Old Westbury