I've read a lot of posts, tried a number of suggestions, and even lost 1.5 hours of my life at the Genius Bar in an Apple store all with no resolution to my problems. Here they are: Problems: iTunes will not access iTunes store iTunes will not backup my iPhone 4 iTunes will not sync my iPhone 4 Background info: iTunes 10.5.0.142 Windows XP SP3 Lenovo T400 ThinkPad laptop Thing I've tried: Using the 'repair' feature of iTunes Running the diagnostics in iTunes Uninstalling and reinstalling iTunes Checking the windows firewall settings to allow iTunes Checking my network connections Deleting the backup files from the hard drive It all started when I download the latest version of iTunes. From that point when I would click "iTunes store" on the left side it would show "Accessing iTunes Store" on top but it would never load. Podcasts that i have set up with subscriptions in my iTunes plus my content all appear in my iTunes library and can be refreshed. I am however unable to access the iTunes store to get any new content. Two weeks ago I got an iPhone 4 16GB. I plugged it in and tried to sync it with iTunes. It would not sync. It would show that it tired but none of the content moved over to the iPhone. It would also try to backup but the backup would freeze and go nowhere. I left it running overnight and the slider bar never moved and no progress was made in the backup. I tried to upgrade the iPhone to the OS5 but it would not work because it could not complete a backup. I've deleted the partial backup files from the hard drive each time before trying again but to no avail. It's frustrating to not be able to access the iTunes store from within iTunes. It's frustrating to not be able to sync my iPhone with my content in iTunes. Any help would be greatly appreciated since I got nowhere with the Geniuses at the Genius Bar.