 Jusjun,   Try letting Windows manage your wireless connection and see what happens.   How to start Wireless Zero Configuration using Windows Vista    How can I disable wireless configuration services and enable the Windows XP Wireless Zero Configuration services    Also try using these Recommended Wireless Router Settings in your wireless router, I use channel 11. Usually a router firmware update corrects some problems.     Rick
I've read some of you have similar issues. I just got this computer the beginning of this month and once I hooked up the wireless internet, it keeps disconnecting me every few minutes and reconnecting and sometimes not reconnecting on its own. At first I figured it was my wireless router, so I moved it closer and it still does it. I also have a laptop next to my XPS desktop and the internet on it is stable and fast (I have used the computers at different times, so there is no way that my laptop could be interfering with the network). So far, I have uninstalled and reinstalled the newest drivers off dell's website. I also applied a windows update and it actually had a newer driver for the DW1525, but it did not make a difference. I talked to Dell's tech rep via chat this morning and he told me to boot in safe mode with network support and I did with still the same issues. Also checked and my Bios firmware is the newest version. He also told me I could speak to Dell's on demand help service for a fee, I told him to forget it! Why should I have to pay for a faulty product? I do believe this is either a driver or hardware issue. It is a pain to keep getting disconnected and I did not spend $1,500 to deal with this. Does anyone have any fixes for this problem? If I don't find a solution soon, I think I might just buy a third party wireless n pci card and install that instead.  Dell you guys really need to step it up and have a fix for this problem, or else you will lose a lot of customers. 
Problem with constant disconnecting with DW1525 wireless Network card in my XPS 
8100 desktop!!!