I have updated to Parallels 8. I am currently running Windows XP. My only reason to run windows is so that I can continue using QuickBooks Pro for my business. After updated to Parallels 8, I can not get Parallels Tools to work. I need to upgrade QuickBooks Pro. So, I am looking at upgrading Windows as well. 1.Which version of Windows is the most stable? 2. Can I install the new Windows and get everything running on it while continuing to use the current Windows XP? Thanks.