Just installed OSX 10.6.8 and Can't Buy from App Store
I have installed Snow Leopard 10.6.8 and ran Software Update, and now I want to upgrade to Lion. I can open App Store, log in, access my account, but when I try to purchase Lion I get a message "We could not complete your request. There was an error in the App Store. Please try again later. (4)". When I click OK, I get the message "Unknown Error." I really don't want to have to reinstall everything - please give me an idea of what's going on. Thanks. By the way, I also created a new Apple ID with a different email just to see and I get the same error.
iMac, Mac OS X (10.6.8), 2.66 GHZ, Intel Core Duo, 2GB RAM