I used Windows 7 before Windows Vista. To avoid any complications in the registry lists or problems with installed software and existing hardware, I decided to use the update function consciously not to use, but to reformat the hard drive before installation, to then Windows 7 new on an empty Festplätte To install. But unfortunately did not work out the format, since I received the error message, even under elevated privileges that I granted to me under Vista before, the folder System 32 "can not be formatted. So I put the Windows 7 DVD, and then decided short hand yet for an update to. First, the but did not work. I got the error message before you install to uninstall Anti Vir ". After I uninstalled it, it still does not work, because the delete function of Anti Vir "apparently does not work clean because in the registry folders remaining remnants of the program. On the Internet I found a program that the program remains of Anti Vir" tracked and completely extinguished. Then after that I was able to play Windows 7. During installation, an Internet connection, incidentally, should be maintained. After about three hours Windows 7 was installed. Then I installed Anti Vir "new, invited just across the the latest Windows Windows Update feature updates 7 down, and it was all over. In the end I can say that the feared complications have not come true! All programs and run all hardware easily! So I am glad that the hard disk formatting was not working at the beginning, because otherwise I would have Windows 7 completely up-played new and would therefore all programs again need to reinstall, which would have cost considerably more time. I hereby would like to basically only encourage all Vista users, quietly use the update feature.