I can confirm the same issue on my desktop. It started after installing the latest drivers. My PC specs:
CPU: i3 4150
RAM: 4GB DDR3
OS: Windows 7 64bit
I'm using the integrated Intel HD4400 as the primary graphics card.
At random occasions the igfxEM.exe process starts hogging the CPU (task manager reports that it uses about 25% of CPU). the only solution is to either manually kill the process or reboot.