You were on the right way to say "You can install Leopard on any computer made by Dell, HP, Lenovo, or..." but you get scared and said "just kidding!". Why people on the web is scared to say "Yes you CAN or maybe you MUST install Leopard on your home PC"? Don't mislead the readers!!! Teorically you must not install any Mac OS X on your business PC as some audit to your office may rise legal consequences. However the license agreement that is bundled with Mac OS X just request to be installed on a "Single Apple-labeled computer" at a time. The license use does not state a requirement for an official Apple label with an Apple Hardware Serial number, so again don't mislead the readers!!! Then what means a "Single Apple-labeled computer"? It will only be defined by layers if you are issued by Apple. So maybe you can avoid be issued if you apply an Apple sticker to the external case of the PC and argue that you are meeting the usage clause. Even if this is not legal, is not probable that Apple go to your home to audit your home PC (don't be a bad boy so cops don't go to your home). The only disadvantage is that the installation process can be a little tricky and newbies may not successfully install it and obviously not all the hardware is compatible. »