Wireless device used; then disappeared

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http://askubuntu.com – Wireless adapter was working fine in Ubuntu 12.04, and now has completely disappeared from my operating systems. I installed Ubuntu 12.04, dual booting with Windows 7. Using a Thinkpad T410i. Installed fine -- detected my wireless device no problem. Used for about a day, turned off wireless in Ubuntu. Rebooted next in Windows 7. The wireless device was available but could not detect any networks. Rebooted into Ubuntu, and then the device did not appear at all. Rebooted into Windows 7 and then the device was completely gone there as well. Tried updating the driver in Windows 7, no chan (HowTos)