CTP build 5308 appears to have the same issue as the previous build 5270 with the Intel Pro/Wireless 2200BG driver.
The default installation may have an incorrect/defective driver installed. The corrective action is:
- use Windows update Vista Applet to download updates - ensure the "Optional" update for the 2200BG driver is checked - install the updates; restart - use Device Manager to Update the driver > Browse My Computer > Let Me Pick From A List - There will be two identical selections for the 2200BG; we had to click the top selection. - restart
Until the driver is replaced, adjacent 802.11 networks and devices will be impacted, even if the Vista computer is not configured for access to a particular wireless network. Typical symptoms on the adjacent computers include the network connection going up and down every two or three minutes as the signal is dropped and re-acquired.
An alternate action is to disable the wireless adapter in Device Manager until the correct driver may be installed.
We have only verified this on a IBM T42 notebook, and only with 802.11 "G", although it is not inconceivable this issue is present with other computer makes and models.

Intel Pro/Wireless 2200BG - impact advisory
Great Tip Greg Thanks, I will test this next week.
I have been struggling with a similar thing, though this would be 802.11b network with a T43, but same card.
Josh Http://windowsconnected.com
"Greg Askew" wrote in message
CTP build 5308 appears to have the same issue as the previous build 5270 with the Intel Pro/Wireless 2200BG driver.
The default installation may have an incorrect/defective driver installed. The corrective action is:
- use Windows update Vista Applet to download updates - ensure the "Optional" update for the 2200BG driver is checked - install the updates; restart - use Device Manager to Update the driver > Browse My Computer > Let Me Pick From A List - There will be two identical selections for the 2200BG; we had to click the top selection. - restart
Until the driver is replaced, adjacent 802.11 networks and devices will be impacted, even if the Vista computer is not configured for access to a particular wireless network. Typical symptoms on the adjacent computers include the network connection going up and down every two or three minutes as the signal is dropped and re-acquired.
An alternate action is to disable the wireless adapter in Device Manager until the correct driver may be installed.
We have only verified this on a IBM T42 notebook, and only with 802.11 "G", although it is not inconceivable this issue is present with other computer makes and models.
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