I have an alienware m11x r2 and i have these network problems. I can only connect to the internet on startup for about 2 minutes then disconnects and says no internet access or limited access. If i try and disconnect and connect again, the connection lasts about 30 seconds then starts all over again. Any help?
Have you tried messing with your network adapter settings? It may not completely resolve the issue, but it is possible at least help.
Open Start Menu and search for Device Manager
Right click your Wireless Network Adapter under the Network Adapters section
Go to properties
Click the Advanced tab
Change Roaming Aggressiveness to Low or Medium-Low
Change Transmit Power to Highest
I have had a problem similar to this, and although this hasn't completely solved the issue, it has helped. My problem is accompanied by a crashing/bluescreen issue, which I am trying to get help with on the Alienware forum: en.community.dell.com/.../19682228
If my issue seems similar to yours, it might be beneficial to keep track of that post.