Thanks!
I was having a world of pain updating my Apple TV 2 from 5.0.2 to 6.2.1 so that I could run netflix.
This helped enormously - except for two small details:
1. I downloaded the iOS 6.2.1 firmware from here:
http://appldnld.apple.com/iOS8/031-07202.20140917.tF6Fs/AppleTV2,1_6.2.1_11D258_ Restore.ipsw
2. I got a microUSB cable that supports data transfer (a lot are only battery chargers) and did the following (sequence is important):
a: launched iTunes
b: plugged in MicroUSB from Apple TV 2 to MacBook
c: powered up Apple TV
d: when it appeared in iTunes, help down the option key and clicked on "Restore"
e: In the resulting dialog, I selected the iOS 6.2.1 restore image that I downloaded in step 1.
3. Left all alone, watching iTunes status in nervous anticipation.
4. After iTunes reported success, unplugged Apple TV, moved it to real TV, powered up, setup everything again - and NetFlix now works on my 4 year old beast. And it works well.