Hello, this is my first post Ever, I'll describe the problem as much as possible:

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Alienware M15x, Intel i7 720 qm, 1GB Nvidia 260 GTX, 8GB ram, 500GB HDD

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I'll start with this, I got my laptop before like 2 weeks, it was awesome, but it suddenly started to give me blue screen of death all from sudden, I use Kaspersky Pure, and seems like after I used Alienrespawn (Recovery for the laptop) the blue screen doesn't show up anymore, now I only have my laptop restarts suddenly, it's not overheating, I don't usually play games, I rarely do, anyway I think it's something to do with the internet connection, after watching tons of videos on any website, I use usb device to connect to the net, and wow once the device stops working the laptop restarts, that's 1

another thing is why I don't think it has something to do with the video card is that when I play crysis for hours my laptop seems to be fine and no restart and no BSOD

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I even know an exact point where I get the Blue Screen Of Death, when I share connection with the Playstation 3 (LAN) I'm going to test the shared network on the PS3 it shows me that obtain IP succeed, network connection succeed ( on PS3 I'm talking) but either once It tests the NAT type or once it's done testing (NAT type is the last test that's why it's hard to tell) I DIRECTLY have a Blue Screen Of Death, I did that like 3-5 times and same results occure

any help or suggestions ? I have a 3 years warranty but I don't plan to use the warranty, I prefer to do my things as long as I can, and I can't wait for 1 week till they give me my laptop back and I realize that they still didn't fix the problem

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thank you in advance !!

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EDIT: oh by the way I used to use the same USB network device on HP530 Laptop, and it didn't have any problem