Windows 7: How do i get network controller driver working?

i bought a brand new Dell Inspiron N5110 and after a a month the pc became so slow even though i had only the pre-installed softwares on it and microsoft office 2010 professional plus.
i did a fresh windows 7 ultimate x64 installation on it and afterwards i have been a ble to install all the drivers except for this network controller driver which wont let my wi-fi work. I have been at it for almost a week with no good results.
Please i need help in solving this problem.Thanks



With regards
Bernard

Hi Benzino1z, Welcome to the forums, Have you tried here Drivers and Downloads | Dell [United States] there are 8 network adaptors to choose from , On the Dell website if you enter the service tag # locateted on the underside of the laptop ,the website will just select the drivers for your laptop

Thx for your advice but the thing is i have gone through all those processes already but to no avail. I have also tried updating the driver using the Windows updater in the device manager but still nothing good has come up.