Isp dns not updating
If your computer connects to other wireless networks, and you have verified that you have the correct frequencies, then more than likely it is not a hardware issue.
Many times when your internet has intermittent issues, but you are still connected to the network, or if you are connected to the network, but not to the internet, you have a DNS server problem.
To see all of the information about your network adapter, go to command prompt and type ipconfig /all, and press enter. If it says no, it means that at some point a static IP address was configured, which may not be the correct IP address for this network.
To set your ip addressing to automatic, see step 6.
Is your computer able to connect to other networks, and just not this one network?
Assuming that your subnet mask is 255.255.255.0, the first three octets (the first three numbers separated by a decimal point...
Please note that if you use Open DNS or another web filter that requires you to use their DNS servers, this could shut off the filtering, or in some cases impact your ability to access the internet. If there are other computers on your network, be sure and check their IP addresses to make sure you will not have an addressing conflict.
If they have addresses below 100, I suggest using addresses higher than 100 and visa-versa.
If your computer will not connect to the network at all, and it doesn't connect to other networks, it's a good chance that you have a hardware problem.
You can try checking the drivers to make sure there are no issues or updates, but if it isn't a driver issue, I strongly suggest just buying a new wireless NIC.