How to fix remove disks or other media press any key to restart

[Kritagya]

My laptop is working normal then I inserted a formatting cd of is win xp
After that it laptop start and showing remove disks or other media press any key to restart and even i restart its again showing it
N when i press any key its showing intel Undo pxe-2.1 build 083
Copyright (c) 1997-2000 intel corporation
This product is covered by one or more of the following patents
Us5,307,459.........

 

[The Paladin]

do you have a usb thumb drive connected to it, if so remove it.