How do I disconnect from network

[lenow]

Please can someone tell me how to disconnect from the network.

My laptop is slowing down and overheating.

Thanks,
Len.

[lenow]

Am switching Off will check back later for any replies.
Cheers,
Len.

[lenow]

Thanks to Mr P.  (Dec 2014)

I now have the answer.

[Runway 31]

If connecting to the network is making your laptop slow down and overheat it may be a good idea to get it checked out.  Even an old and underpowered one shouldn't act that way.  I wouldn't leave it unattended.

Alan