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I am trying Ubuntu 12.10 on a Sony laptop. I have created a hotspot in the wireless network options and it was working fine. Then I stopped hotspot and tried to turn on the wireless internet but this is not working and adapter appears to be switched off.

This laptop is dual boot system having Windows 7. Even if I attempt to access the wireless network in Windows 7 it is not working.

How can I resolve this issue?

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