Win7 64bit, everything was working fine before 10.5.1.42 update... Now everything works EXCEPT whenever I tired to access iTunes Store, it crashes when the top bar reaches about half way everytime! Done everything this page says http://support.apple.com/kb/ts1717 including uninstall/re-install and nothing works... Please help!!!!
The only possible temporary fix that worked for me:
Right click on the iTunes icon, (whether that is on the desktop, start menu etc) and press "Run as Administrator" the store should work using this method.
I think you will have to do this EVERY time you want to start up iTunes.
Message to apple: we shouldnt have to continually run the program as a administrator to use key features of a program, especially when we, the customer are wanting to purchase things off your store, also means your losing out on money