YES, but you have to use a english version of Vista.
Check this at Siemens site:
http://cache.automation.siemens.com/dnl/jA/jAyNTYyMQAA_21927773_FAQ/WinCC_V7_compatibility_list_e.pdf
please refer to the associated "Install Notes" and "Release Notes". Pay attention in particular to the software...
This maybe can help you when you decide, This 7 questions can be for any vendor.
http://www.automation.siemens.com/w2/efiles/pcs7/support/marktstudien/PAWP00015.pdf
Best Regards
Peer95http://www.automation.siemens.com/w2/efiles/pcs7/support/marktstudien/PAWP00015.pdf