I 'm running a Thinkpad T400s with Windows 7. Periodically I find that the wireless radio has turned itself off. The switch was not moved. When I have Windows troubleshoot the problem it turns the radio back on but also tells me that my wired connection is defective. I have no wired connection. I have adjusted the wireless power setting to high performance.

Hi, I would like to suggest you update the BIOS and the chipset drivers, uninstall and reinstall the latest version of the wireless network adapter driver for Windows 7. If it does not work, you may also test the issue in Clean Boot to check if there are any software conflicts. Regards,Arthur Li - MSFT