I have a first generation Nexus 7. It was getting so slow as to be useless, so I did a factory reset and it is not much better. It then informs me that an upgrade to Android 4.3 is ready. So I do that, but it doesn't seem to take because a day or two later, it informs me again that an upgrade to 4.3 is ready. I look and I see that the current version is 4.2.2. What is wrong?
Don't know if this matters, but before the reset, it was rooted, and so after I assume it is not and that's fine.