|It might be easier if you explain why you have a new hard drive in your laptop.|
If the old drive is good but too small, you can transfer an image of the original drive onto the new drive with software available on the hard drive mfg's web site. You would need to probably then expand it to use the entire new larger drive and you would need a SATA to USB cable or external drive case (which could later carry your old drive for backups).
If the drive died and you did not make a set of recovery disks as recommended for most new machines, the easiest thing would be to purchase from the laptop manufacture a set of recovery disks made for your machine (usually fairly reasonably).
You could purchase a new copy of Windows but that would cost more...
I guess there could be other possibilities but you did not give us too much to go on.
You have to be a little bit crazy to keep you from going insane.
message edited by Fingers