Please be aware that we provide generic drivers that have not been developed or tested specially for your system. Each motherboard, laptop or Original Equipment Manufacturer can add, remove and change features on the video controllers they implement on their systems. Therefore they provide customized drivers to support such changes. So we always recommend using the latest drivers provided directly by your motherboard or Original Equipment Manufacturer.
If you still need to use the generic drivers, you can try to force the generic driver by uninstalling the driver that was provided by your laptop manufacturer, this is done through the Control Panel, go to programs and features. Then locate any entry similar to Intel® Graphics Media Accelerator or video driver and remove it. After that, restart your system and try to install the generic driver again.
You can also try to force the driver with the instructions on this site:
Concerning, the issue with the video resolution of the external display you are using, make sure to be using the latest BIOS for the Lenovo system you are using, install the latest driver for the external monitor connected (available on its respective manufacturer's website) and use the latest driver for the video controller. Also make sure to be using a direct connection for the monitor and avoid the usage of adapters or converters that could prevent the system from reading the information from the external display properly. More information and a special driver on this issue is available on this article:
BIOS downloads for your system are available at: