Reply #71: Yes

[high density]

OEM licenses have always been closely tied to the original computer anyway, so I'm not sure if there's really anything new here.

This is unrelated to licensing, but I do know from personal experience that installing a new motherboard will certainly freak out Windows XP. In Windows 98 this used to be a fairly simple process but Windows XP almost requires a complete reinstall when the IDE controller changes. Windows XP definitely could use some sort of console based disk manager that can set drive letters in cases like this. I haven't had any problems with activation yet even though I've had to do it about four times since 2003 after hardware changes (retail license.)