I think it isn't because you updated the drivers, it's because of a problem that came with the update. They're working to fix it now (I think). You may try to do this (see picture) and apply some commands I've seen in the forum in the console, sometimes it solves the problem.

PD: I dont know if this solves the problem with IW5M too, you can try.

The update that fucked everything up was In IW4M not IW5M.

Jim655321":r313ii59]The easiest way is to just tell your Nvidia Control Panel to always use the High-performance NVIDIA processor.

> Open the Nvidia Control Panel (should be able to double-click it in your task bar)

> Click Manage 3D settings

> You should see "Preferred graphics processor" with a drop-down box below it

> Click it and select "High-performance NVIDIA processor"

 

Now the toaster should run all your games, instead of the potato. Much better. And easier than screwing around with getting it to work with iw5m.dat instead of iw5mp.exe, because by default it's looking for an executable and that's what causes the problem in the first place: iw5m.dat isn't a recognized executable.

 

Source: I'm playing right now on a laptop with a GT540M and Optimus, so I had to do this exact process in order to play while I'm away from home.

 

Finally, this was the right solution !!!

 

I knew that i just forget to change a nvidia option, because the uptade just put them bu default! But i totally forgot this one.

 

Thank you very much guys for all your help ! I now have 90 fps every time, and no lagg!

 

I know that i was a little stupid, but i didn't know that my settings would be by default next the uptade and i didn't have the reflex to save them.

 

Thank you one more time, guys!

 

(The topic can be locked )

last nvidia notebook 314.07 drivers can be automaticaly activate nvidia gpu for iw5m or iw4m. its automatic run nvidia or not.

 

 

 

install drivers ( i cant give link from here ) start iwm5 and quit iw5m to windows.

 

go nvidia control panel. manage 3d settings. add.

 

u can see iwm5.dat.exe. select it. and select preferred graphics processor : high performance nvidia . and click apply and ok.

 

when do this all aplications automaticaly select what its need. nvidia for game intel hd graphics for different operations ( like video play from windows desktop )