System restarts automatically after inserting cd

does it do it at any other time?
its possibily a power supply issue
give us your specs including the power supply

also check your device manager for any yellow conflict symbols

Probably the device is causing an error and the windows is restarting. my computer right click > properties > advanced > start up and recovery > settings > uncheck automaticly restart under system failure options and clik on ok. ok. Should stop the restarting issue. I would say replace the cd-rom but lets have some detailed look. Waiting for the specs...

have you done anything to your pc lately? upgrade hardware or installed new drivers or software?