Drivers For Dell Inspiron 1440 Windows 7 Wireless Network Adapter?

I am only getting " limited" access to the wireless network at my university, meaning no access! I had no wireless adapter issues 20 min earlier. The only thing I did install was driverupdate, cause I was getting the blue screen only when I was connected to the wireless network at school and the code that came up on the blue screen said something wrong with the driver.I have tried s restore to te previous day, that didn't work! I uninstalled DriverUpdate, still doesn't work. I've tried clearing dns cashe at cmd, that didn't work.