Ideapad U410 The graphics driver cannot be installed or installed under WIN7 system

Failure phenomenon:

IdeaPad U410 model in the installation of Win7 system, from Lenovo official website download installation Graphics driver installation is not successful, in the device management of independent video card always show "exclamation mark." As shown in the following illustration:

Solution:

When you encounter this problem, please click "Fn+f2" to enter the BIOS when you see Lenovo logo on the boot. View BIOS version versions under the Informaostion option. If the BIOS version is lower than 65CN21WW, please refresh the BIOS version to release 21.

Tip: There is a large risk of refreshing the BIOS, please back up your computer data in advance, and under the guidance of a professional person or to the Lenovo service station.

Note: After refreshing to the 21 bios, the SATA Controller working mode is automatically adjusted to RAID mode in the BIOS. If you select a different mode installation in the BIOS when you install the system, a blue screen problem will occur when you enter the system after refreshing, please reboot into the BIOS to modify this mode.