Pc Get Restarted

Try uninstalling all Burning and Virtual Drive software. Restart the PC and then uninstall the Optical drives from Device Manager. Restart the PC and let them be detected and reinstalled. Try to read a CD/DVD.

If you can't read from it try this.

Download Prime95.

http://www.mersenne.org/freesoft.htm

Prime95 is used to put your system at full load. You want your system at full load when checking your voltages to ensure your PSU is up to spec. The whole point is to make sure your PSU can handle what your system asks of it. When it is installed run it and go to Options and run the Torture Test. Run the Inplace FFTs (Max Power, Heat and some Ram).
If your PC restarts during this test you have a faulty Power Supply (PSU) and it will need replacing.

Download SpeedFan and check the Voltages and Temps while Prime95 is running.

http://www.almico.com/sfdownload.php

You will want your 12-volt rail to be within 11.52 to 12.48 during load. This means when you are running your cpu at 100% you do not want to drop below 11.52 or you may experience stability problems including but not limited to system restarts and Windows crashes. For the 5-volt rail, you want it to be within 4.8 to 5.2 to be within the 4% range. As for the 3.3 volt rail, you want it to be within 3.17 to 3.43.