When the LAN is plugged in you are not using the WiFi, unless the LAN is not attached to your PC.

So, with no LAN cable, and only wireless, open command prompt (type cmd in the Search program and files in the start menu) and type

ipconfig

From here, find your Default gateway

Now, type in ping default gateway EG

ping 192.168.1.0

Please note the results.

Whilst in this screen, please type in

ping 8.8.8.8

Please note the results.

My guess is, both results are bad and the cause is the signal from your machine to your router is bad.

You may need to get an N range router (my guess is you're on a G), or you need to update your wireless device on your machine. Lastly, try moving the router closer to your computer, or move your computer closer to your router, just to see if it is a distant issue.

Lastly, try and connect using a smart phone, tablet, laptop/netbook and see if you have any problems with the connection as well.

When the LAN is plugged in you are not using the WiFi, unless the LAN is not attached to your PC.

So, with no LAN cable, and only wireless, open command prompt (type cmd in the Search program and files in the start menu) and type

ipconfig /all

From here, find your Default gateway

Now, type in ping default gateway EG

ping 192.168.1.0

Please note the results.

Whilst in this screen, please type in

ping 8.8.8.8

Please note the results.

My guess is, both results are bad and the cause is the signal from your machine to your router is bad.

You may need to get an N range router (my guess is you're on a G), or you need to update your wireless device on your machine. Lastly, try moving the router closer to your computer, or move your computer closer to your router, just to see if it is a distance issue.

Lastly, try and connect using a smart phone, tablet, laptop/netbook and see if you have any problems with the connection as well.