How you do the update may factor into that? I did the update through the Store once and had issues. I ended up with intermittent WIFI and wireless keyboard and mouse issues. I've seen other similar reports from other forum members also. No such issues when doing a clean install though. I didn't like Metro in 8.0 but now its more multi monitor friendly in 8.1 so that's what I'm running. If your current Windows 8 install is an factory OEM install I'd recommend creating your recovery media, if you haven't already. The factory recovery utility may not work correctly after the update.