It's time to upgrade again to Windows 10, from Windows 8 to Windows 8.1
Now my laptop updated to Windows 8.1 from Windows 8. When activating, it couldn't connect to the Internet by wireless LAN. By my iPod touch, wireless connection was available, so maybe there was a problem with the laptop side, although wave condition wasn't so good. There was no way to reload then, so I didn't have a choice but skipping the process. After a reload, the wireless Internet connection recovered. Then it's time for Windows 10.