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Hello, I installed AutoCAD on a brand new Lenovo W530 with 2 graphic cards: Integrated Intel and Nvida K2000M. When I just work on the built in screen AutoCAD does not seem to work well, the mouse movement lags. The problem is gone immediately when I simply extend my desktop onto an external screen.. That is all I do : FN key + projector icon, choose extend desktop and enter -> AutoCAD works great. Here is some background info / things I have tried: 1) I disabled Nvidia Optimus in BIOS to makre sure all graphics is on the Nvidia (i.e. disable integrated graphics) -> this did not solve the problem, also after applying the extend desktop trick 2) In the Nvidia 3d settings I made sure that AutoCAD works with the Nvidia card. 3) Nvidia drivers are upto date 4) When I open AutoCAD it appears in the nvida window (in the taskbar) that shows which programs are used by nvidia 5) After extending the desktop I stay with AutoCAD on the builtin screen Please help! It is frustrating to see AutoCAD working so much better on my old Lenovo R500 with ATI HD 3400 than on the W530.