My practice of scavenging has given me two (three if I can find the third) Windows 7 Home Premium licenses. One is from a Toshiba laptop and the other two are from HP desktops.
Can I use these licenses to load Windows 7 on any PC I want, or do I have to keep an HP mobo around?
You can't legally use OEM licenses on other hardware. I am not sure if it's possible at all.