How come when I turn on my laptop it just shuts off?

Faizan Jamil, the frist thing I would do is try to dtermine if it is your computer or your software. go ahead and start Windows in safe mode first and see what happens. I have had numerous occasions where the software was the actual error. Just in case you are not sure about safe mode

1. Remove all floppy disks, CDs, and DVDs from your computer, and then restart your computer.

Click the Start button Picture of Start button, click the arrow next to the Lock button Picture of Lock button, and then click Restart.

2. Do one of the following:

If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you will need to try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer.

If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start in safe mode, and then press F8.

3. On the Advanced Boot Options screen, use the arrow keys to highlight the safe mode option you want, and then press ENTER. For more information about options, see Advanced startup options (including safe mode).

4. Log on to your computer with a user account that has administrator rights.

http://windows.microsoft.com/en-US/windo...

When your computer is in safe mode, you'll see the words Safe Mode in the corners of the display. To exit safe mode, restart your computer and let Windows start normally.

Also check all your Bios settings to make sure that they are ok. Most of the time it is best to accept the dafault bios settings since they are the safest for your computer.

I do hope that this helps. Give it a try and let us know what happens. Of course make sure that your battery is working and your AC adapter is working. Good Luck