Stock, not rooted. Probably not considered major for many, but after waiting so long, you expected it to be a very well planned, simple task. The first thing I read was to uninstall any old versions of Kies. Was not listed in Add/Remove Programs in XP Pro, and when I finally found the directory there WAS a Remove Program Icon, but it did nothing. Never saw any explanation after searching for hours that running Kies would update the program automatically without uninstalling as instructed. Next, appeared that all drivers installed while following the instructions, but received a fatal error message stating: "Cannot install this hardware: Samsung Android Composit ADB Interface. A fatal error occured during the installation ". More searching and agonizing. Finally, just went into My Devices, located Samsung USB Driver and manually updated, allowing it to search the web, downloaded and installed and 2.2 upgrade then worked. Thought my Captivate was not going to boot back up, but finally did. Much relieved and was excited to start watching videos on ESPN, but still can't. More reading and agonizing coming up. Very disappointed in AT&T (for knowing nothing), Samsung for extreme public disregard in this matter. Could not locate my registration and log-in info at Samsung, attempted to re-register, then it found me because my info was already being used. Imagine that.