There is an optional Windows update, KB2830477, that causes intermittent crashes in Windows Virtual PC XP Mode. The only solution is to uninstall (or avoid installing) the update. For more information see this site.
Here’s a clever postal scam of some sort. A post card in UPS colors claiming there is a package waiting for you. No idea what they would try to scam you for if you call their toll free number but I’m sure it can’t be good.