To Reset The Computer - HP Pavilion N6xxx Reference Manual

Hint
To boot from a floppy drive or CD-ROM or DVD drive, press ESC during reboot when
the HP logo and prompt appear. Then select the removable floppy drive or CD-
ROM/DVD drive as the temporary boot device.

To reset the computer

Occasionally, you may find that Windows or the computer has stopped responding, and
will not let you turn the computer off. If this happens, try the following in the order listed.
1. If possible, shut down Windows: press CTRL+ALT+DEL, then click Shut Down.
2. Slide and hold the power button for 4 seconds, until the display shuts down, then
press the blue sleep button to restart.
–or, if this fails–
Insert a straightened paper clip into the system-off switch on the right side of the
computer, then press the blue sleep button to restart.
Using Your Computer
Operating Your Computer
Reference Guide 25