I have 2 virtual machines running on my macbook pro, windows 7 pro & windows xp pro. I installed the full retail version of windows 7 pro first, & now recently installed windows xp pro service pack 2 OEM. I also have some windows apps installed on both. But I notice that while desktop icons are present in windows xp (after installing them), they are blank squares in windows 7 & when I click to launch the apps in windows 7 it cannot find it. It is vice versa as well, if I reset & get full desktop icons back in windows 7, & then go to windows xp pro, the icons for those same apps are now blank generic squares.