A recovery disk is supplied by the manufacturer of the PC. Dell, HP, Acer etc. It will only work with the same make, model and number, or number series of computers.
So say for instance you have a Compaq Presario 5010. A recovery disk will only work on a 5010 or in Compaqs case 5000 series.
If you have a full retail disk of Windows then it can be used on any computer but it can only be validated on one computer at a time.