Test developed application in virtual pc

Hello,

for many year I test my programs with virtual Pc 2007, because I can test on all platforms from MS-DOS until win7.

Now we have win8 and it does not work under virtual pc 2007.

What to do.

Which virtualization exist to test programs for many platforms from xp to win8?

There are some obvisously but all are integrated in the host System what is not fine, virtual pc 2007 was simple a General usabel application and furthermore you cannot test on all platforms from xp to win8.

Thank you for an answer.

rowe10