My computer sometimes reboots after clicking on a desktop icon/shortcut.It Why is that happening?

Question

My OS is Windows XP HE SP2

Answer 1

Hi!

There seem to be some issues with your OS, depending on your current OS configuration. Try updating your OS.
The process is simple: the kernel (core) tries to access an object (file, folder) but for some reasons a fatal exception (error) occurs, thus leading to machine reboot (to protect your hardware).
For more info on this try: right click on My Computer, select Manage. On the left hand panel click on Event Viewer. Then, on the right hand panel you see some categories. See there... You need to have some privileged account on the machine, such as Administrator, Power User, etc to properly access the Event Viewer.

Good luck!