You or someone installed logmein so you or they can remote into your PC that where the logmein driver came from.
You did try and change your resolution back to a higher setting right? You didnt say so, so I have to ask.
Id visit Nvidia and download the latest driver for your vid card and reinstall it! Drivers - Download NVIDIA Drivers
The yellow exclamation mark is telling you there is something not right with the current HW/driver setup. A reinstall of driver should fix it!