Why does my laptop turn off randomly?

ill be sitting somewhere in my room and all of a sudden my laptop will turn on. it's happened three times, the first time it turned on, i got up and turned it off then it came on again,the second time i just shut the screen . . . any explanation?

This has been happening for about three weeeks now. Before then, i didn't use it for three weeks, so it was off that whole time. The problem now is that It turns off ...shut down suddenly when i'm using it, or sometimes when i move or slide it. Sometimes...

I have a phillips 15nb57 series which is roughly 5 years old... I love it, but now it won't turn on... It charges properly but its been like this for a week now... When I press the power button it comes on for an average of two seconds and then switches...

I have a SONY VAIO, VGN-CS 110E model laptop. after i turn it on, i cant hear the fans running, so after 5 minutes the computer shutdown unexpectedly because of over heating, so i again turn it on and again it shut downs in 3 or 4 seconds this time....

I bought my laptop from Best Buy back in the Fall of 2007. Initially, I had issues with it from the start and had to send it back to them to get them to completely fix it. Ever since then, it's worked perfectly - until yesterday. Yesterday I came home...

i have had it just over 11 months and since i got it i have had a couple of problems (now only 1/3 of the USB sockets work and the laptop rarely boots up properly without having a charger plugged in) the screen has come half off at times but my dad fixed...

Hey everyone, I own a Sony Vaio VGN-CR23G Laptop, and I have a problem with my broadband. Whenever I turn on my laptop, people who are connected to the internet (wireless) get cut off from the wireless until my computer connects to the internet. Like...

I have a an emachines E627-5082 laptop. I woke up this morning and first thing I did was turn on my laptop. It started up like normal all the led lights lit up. But the screen did not turn on ever. I was just using it normally last night before I shut...

When I turn my laptop on it says I am connected to my wireless network but when I try and use the internet it says the page cannot be displayed. The only way I seem to be able to fix this is to turn my wireless box off and on. However everytime I turn...