Because the nvidia Optimus install package fails from the lenovo site, i tried the nvidia drivers from there own site. With this set of drivers i get an error message that says you must install Intel Drivers First. So with the Intel Drivers from Lenovo Site or windows update.
Thanks for your help so far guys.
Had this issue with this laptop.
Running w7 pro, I had to install the chipset driver, intel graphics driver and finally nvidia grphics driver.
All drivers were downloaded from the intel and nvidia sites - not from lenovo or windows update.