I reinstalled my notebook to Windows 8.1 and wanted to use the Lenovo System Update to install the drivers and update the firmware. The only issue is that I was unable to click next after I accepted the EULA. I found a solution that has you run the silent install and reboot.
To run the silent install make sure to run the command prompt window as Administrator and add /a /s /vâ€ /qnâ€ after the .exe. [Example below] It wont work if you don’t have the quotes after /v and /qn. It took about 1 minute to install.
C:\SystemUpdate502-06-26-2013.exe /a /s /v"/qnâ€
When its done installing, or about a minute, search for â€œSystem Updateâ€ and launch.