Can you CTRL-ALT-DEL and get to the task manager? Anything taking up huge amounts of CPU time?><> ><> Non comprende -- CPU??
On your keyboard you have the keys mentioned above. If you press the Ctrl, the Alt key and then the Delete key and hold them down all at the same time you should get a window to pop up that will show you what programs are running. This is the Task Manager Window. It gives you the ability to stop programs. Stopping some programs can cause your system to crash and all other kinds of problems so if you are not sure don't try stopping any but at least look through it and see what your computer might be doing. Unfortunately this does not necessarily show the actions of some hidden programs.
If you do those key sequnces twice it will reboot your system for you twice. If your keyboard is actually sending a signal to the cpu that is causing your problem then this function probably will not work.
If that is the case then check your keyboard to insure it is clean and no keys are sticking down. Then check the keyboard driver for proper functioning. If the keyboard driver is malfunctioning you might have to reinstall it.