2 Answers

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see here>>>http://pcsupport.about.com/od/findbysymptom/tp/computer-wont-turn-on.htm

I found this information for you, i hope it helps >>>1) Start your computer in safe mode.
When you power on your computer continuously tap the "F8" key until a menu appears. From this menu select "Safe Mode With Networking". If you are asked what operating system you wish to start, select your operating system (using the arrow keys) and press enter. In most cases there will only be one. Once loaded you will be asked a "Yes" or "No" question in a prompt. Select "Yes" to agree to using Safe Mode.
2) Open your browser and download Spybot Search and Destroy.
Go to the link: http://www.safer-networking.org/index2.h… and select your language on the right. Under "Products" select Search and Destroy.
3) Install Spybot Search and Destroy.
4) First Run.
You will now be prompted to create a registry back up. Press the "Create registry backup" button and in a short while the "Next" button will light up. Click it. Press the "Search for Updates" button. Select a mirror and press next. Tick everything and press "Download".
You should get a message saying "Please Re-apply immunization after this update". This is refering to the SDHelper and TeaTimer options which you may or may not have installed earlier on. If you did, then you'll need to turn them back on by clicking "Immunize" on the left hand side of the main screen. I suggested that you didn't, so, if you didn't, don't worry about it.
Click "Ok" and click "Exit".
You'll see the warning prompt about removing advertising and how it might remove ad supported applications. Click "Ok".
5) Scan.
This is the important bit and it's also the easy bit. On the main screen click the "Check For Problems" button. You may be prompted to remove temporary files in order to speed the process up. This is fine.
It'll start scanning. This can take some time (up to two hours).
6) Removing Problems.
Okay, it's looking good. Your scan is complete and you've got a big list of problems. Most of these are likely to be relatively harmless (tracking cookies), but are still an invasion into your online privacy. Some of them may be more dangerous.
They should all be ticked ready for removal. You can untick some if you think you need them. Click "Fix selected problems" and click "Yes". It should quickly tell you how many problems have been fixed. You can now restart your computer as normal.
Sometimes the problem file(s) will be active at this point. This will mean that Spybot Search and Destroy will be unable to remove it. In this case you will be asked if you would like to schedule a scan for the next time the computer boots up (it doesn't have to be safe mode). I strongly recommend that you do this. The scan will probably take the same amount of time, but this time it will remove the problem file(s) without any trouble.

I hope this helps, I'm sure it will. If it doesn't, make sure that your processor isn't overheating. Intel Processors will automatically slow down to prevent them burning out. Check that the fan on the processor is working and that it's not clogged with anything such as wires, dust or pet hair. There's a decent guide to doing this on my website in the sources page below.
If that seems fine, you may want to consider backing up your important files and reformatting your system.