I have a Dell Inspiron E1505 laptop and at home on my AT&T Wireless Router the computer connects to the internet via the wireless just fine. On any other wireless it connects, then disconnects and constantly connects and reconnects. I removed the antivirus (avast), disabled the windows firewall and it continues to connect and disconnect constantly. I run the windows troubleshooter but it tells me there is an error but provides no details. Again, at home the wireless works fine on my AT&T Wireless Router. Any ideas? Thanks.