I recently purchased a Lenovo Y450 with Windows Vista Home Premium. I have this extremely peculiar problem when I connect it to my home WPA-Personal secured wireless 802.11 network. As soon as the laptop boots and attempts to connect, it resets the wireless network -- and all the other computers/laptops in my household have to reconnect to the network. This is really insane -- I have tried resetting the wireless router (Trendnet) as well as played around with the settings of the wireless adapter on the laptop (Broadcom) including reinstalling the device driver and modifying some of the configuration properties of the device driver -- to no avail. Could someone please help me with this issue -- it is driving me insane!

What happens if you remove one or 2 of the other comps within the network when connecting this Y450?

cheers ...

Irrespective of the number of computers/devices on the wireless network, as soon as the Lenovo boots, it resets the wireless network.

Update on this issue: I booted the laptop to Ubuntu on a live USB disk and connected to the wireless router -- no issues with the wireless network.

Still have this problem on Vista. arrrgh...driving me nuts!

Try searching for latest wifi driver updates?

cheers ...

Okay! Issue is fixed -- )

After some research, I discovered that the laptop comes pre bundled with Lenovo Readycomm -- a network management package. I suspected that it may be interfering with the drivers that Windows was installing for the network adapter. So, I uninstalled Readycomm and reinstalled the WiFi adapter drivers. Still, I was facing the same issue. Then I realized that the wireless network information was probably cached by Windows. So, I removed the drivers again(from Device Manager), deleted all wireless profiles (from Network and Sharing Center >> Manage Wireless Networks) and executed the following command in cmd (run as administrator)
netsh winsock reset

After this command was executed, I restarted and let windows detect the WiFi adapter and install the drivers. Voila! Issue fixed!

In hindsight, I am probably not the first one to face this issue. Considering the root cause(Lenovo ReadyComm messing up the device driver), everyone who buys this laptop should have it. I wonder why there were no documented resolutions. I should have called Lenovo, they definitely must have had people calling in with this problem and I am guessing they may also have this solution documented. Damn Lenovo -- they should patch all their Y450s before shipping them off to unsuspecting customers -- this was a terrible consumer experience. I am glad I am fairly geeky to have figured this out on my own. Lenovo, if you are reading, this needs to be patched!

Nice finding and sharing. REP!

cheers ...