Hello. I have Vista Ultimate 64-bit installed on my MBP i7 2010. Recently, Windows has been running very slowly especially during startup. It takes a long long time from booting to real use. I had no such problem before. Besides, I want to upgrade to Windows 7 Professional. What is the proper way of doing so? Shall I erase the original Windows partition under the Bootcamp utility, create a new windows partition and then install a full version of 7? Alternatively, shall I get an upgraded version from Vista Ultimate to Windows 7 and then do the upgrade under Windows? Thanks.