You can always try it and report back...no one will slap your hand. But, if problems arise, you're on your own. Then it may not work at all or stop in the middle for whatever reason.
If the laptop is a lesser OS, then get the Win7 adviser pgm. and run it to tell you what needs to be addressed in order to be Win7 ready. Also, if there is a Win7 upgrade available to you at some reduced cost. On top of that even if Win7 is installed you need to load all those laptop drivers and specifically support what you have. laptop have a harder time becoming 100% if too old or lacking in some way. In other words, this isn't a slam dunk.
I have 2 HP Pavilions 1 laptop and 1 desktop. Is there a way to use the recovery on another system?. I know it's not legal, but I want to try Windows 7 on my laptop.