may i know what cause these problem? i disable all the firewall already.. and i dont have any antivirus.. For sure not the modem problem because others can connect with the wireless very well...

Hi Is the Wireless card's drivers are updated x64 drivers? Jack, MVP-Networking. EZLAN.NET

Hi, You may also consider to update the firmware for your wireless router to improve the stability with Windows 7. After that, I would like to suggest you test the issue in Safe Mode and Clean Boot to narrow down the possible causes. What are the results in both modes? Regards,Arthur Li - MSFT

Hello! First of all install a excellent antivirus software on your PC and scan all hard drives. Your wireless driver should be compatible with Windows 7 64 bit otherwise reinstall the driver and restart the PC . Then connect to the particular network. I hope your problem will be resolved.Regards, Arsalan Waseem M.C.I.T.P Exchange 2007 M.C.T.S Win 2008 Network Infrastructure M.C.T.S Vista Client

It's not your fault or a virus. Microsoft, Atheros and Linksys can't play nicely together. Microsoft and Atheros need to release a damned proper driver to fix the problem. I can't even connect to my internet right now because of this problem - I have to use my friends wireless. Get it together MS.