IBM laptops come with 'Product Recovery' built in. (some models)
When it starts a message 'Press F11 to initiate product recovery'


There is a hidden partition on your hard drive that contains images of it's original factory O/S and all the drivers.

Otherwise, they sent a bootable CD with each Laptop that did the same thing.

If you wish to spend $20 and get the original....it's worth it (just for the drivers, and 'unknown devices')

Of course you can boot a Windows CD; install it, and then download the drivers from IBM.