10.7.3 Kills my WiFi

hey guys, i'm in big trouble.

ive got 3 macs , have installed 10.7.3 on 2 of them. 2 can't connect internet anymore.
have tc 3. generation , have updated latest firmware.
on third mac running 10.7.2 have updated airport utility , finds tc fine. when search tc on other 2 machines ap finds nothing.
best guess 10.7.3 problem?
have tried updating combo update no luck.
can't access time machine backups can't roll 10.7.2

have suggestions?

nb worst error have ever had on computer system. windows have never killed internet connection update. apple not enough.

 

try basics first:

reboot modem.

reboot tc (power off , wait 2 minutes, re plug)

shut down macs

reboot modem , tc, try macs again...i updated 3 without issues, imac mbp mba running lion latest updates.

 

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