I have this issue with only ONE monitor. It's pervasive- windows explorer, flash videos, mp4, avi, mkv, when scrolling a web page....
Almost always a rectangle of tearing in the bottom-left portion of the screen. This is ridiculous.
Intel HD 4600; Haswell i5; z87
8GB DDR3
Windows 7 Pro sp1 on 160GB SSD
... What gives here? Why must this be so difficult?