Virtualization, again, is whether there are ready instances of W7, XP, etc?

Too lazy to put from zero, sometimes down (with anger). Put W7 under Parallels — not everything is so rosy was on the penultimate Edirne MBPro with the simplest videhoe and 8 gigs of memory. Right now, no hands to install XP will not come. I have found it seems to be on the Virtual PC website instances the old systems, it would be nice if there were similar to modern systems.