Thread: Pc go to sleep

Hello guys,
I am having Dell Studio 8100 XPS,when i try to chat on mns or watch movie on you tube pc goes to sleep. I happened to check power setting and the sleep it is set to never. When i browse on internet it goes to sleep mode. Any clue?

Thanks in advance.

You might have by mistakly pressed fn+sleep key or same on your keyboard. Try to disable sleep mode?

I have had a feeling in the power settings and sleep is adjust to never. Now I have observered this only appears to happen when am downloading from steam. For instance steam would be accessing in the back ground wile downloading a game. While I browse the internet. It will then go into sleep mode. This has happened 4 times today.