I've a clean Windows 7 64 Bit Pro. installation on my t410s 2904 FYG (no drivers no additional software -> just windows). The driver 220.127.116.1155 / 18.104.22.168 (NVIDIA Display Driver for Windows 7 (64-bit) - ThinkPad T410s (Switchable Graphic Models)) doesn't work on a clean Windows 7 64 Bit installation.
If you just upgrade the older version with this one it does work.... Unfortunately you can't download the older driver on the lenovo support page.
How can we get the prior version?
For members who would like to roll back to the previous driver, here is version 22.214.171.12498