I have a Asus GL552VW with a GTX 960m and windows 10 which worked great with blender. But after I (well it was auto) updated the new driver through Geforce Experience which is 376.09, blender start to lag alot. Like A LOT!!! When using Blender, I couldn't click anything and had to wait for a few seconds for Blender to respond. It's not freeze or crash. It just like slowwww frame rate. Just like when you use subsuf too much.
I have reinstalled the driver (couldn't find the old one) and blender but it still happen. I ended up reinstall windows but it still happen. Just few days ago I have modified the registry to change the TdrDelay to 16 but it seem to be not the case since Blender worked fine back then and I reinstalled windows.
I have tried the zip version of 2.78a and 2.78 and 2.77, happened on all 3 versions.