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Laptop:
Toshiba Satellite L500, windows 7 home premium
Problem:
Something wrong with the wireless adapter, where it works fine for 30 minutes after starting the computer, but suddenly it is getting disabled by itself and i could not enable it without restarting the system. I tried to adjust the power management properties for the wireless adapter but for some reason I could not reach it (the power management tab in the adapter properties's window is not there!)
The problem is not due to the router since my other devices has no problem with the WiFi connection.
Did you update the WLan driver?
Please try to uninstall the WLan driver from the system.
Then visit the Toshiba WLan driver portal http://aps2.toshiba-tro.de/wlan/ download the newest version for your Wlan card and install it again.