Hi metalmania31,
For your information, I had done the steps as your suggestion but unfortunately it doesn't work. From the BIOS setting, it shows that the adapter is already enable.
My problem is the Wireless Network Connection is not connected where it does not detect my home AP but only shows my neighbour's AP. However, I managed to get connected using my neighbour's AP without any problem (where Wireless Network Connection can connected to internet, seems like wireless adaptor work fine).
What I'm confusing is that other network device (other notebook) can connect to my home AP but not vostro 3400. Futhermore, my vostro can also connected to other AP as now I'm using my neighbour's AP.
Any suggestion to further investigate my problem ?
Really need your help.
Thank you