Somewhere on teh intarwebs Barry Watzman wrote:
> The Win7 XP Mode is Virtual PC with a bundled copy of XP (you could
> obtain Virtual PC and then install a copy of XP under it and you would
> have essentially the same thing, but that would "blow" a valuable
> ($100 to $300) XP product key; XP mode essentially gives you the copy of
> XP
> free).
> XP mode will not work under Windows 7 Home premium; it requires
> Business or Ultimate.
>
> XP mode also requires a CPU with [I want to say "Intel"; but some AMD
> CPUs have it also] "virtualization technology"; amazingly, some Intel
> CPUs have this and some don't, and no one ever paid any attention to
> it until now, so now it's a real "surprise" when it's missing, since
> it is a feature whose implementation was so "hit or miss" that in some
> cases
> more expensive CPUs lack it and less expensive CPUs have it. I have a
> Core 2 Duo laptop that does not have it.

Yeah, it seems that only the 'premium' C2Ds have it. Oddly my home-built
desktop CPU doesn't (E7300) but my ThinkPad T60 does (T7400) even though the
desktop CPU is a a couple of years newer than the laptop CPU and is a
die-shrink (45nm) of the original C2D. <shrug>

Cheers,
--
Shaun.

"Build a man a fire and he'll be warm for a day. Set a man on fire and he'll
be warm for the rest of his life." Terry Pratchet, 'Jingo'.