Just wondering, have you also turned to Blender's support for help? (
https://www.blender.org/support/)
Also, a screenshot might help Support, as well as knowing which video card you have, when/if you updated your graphics driver and what your OS is...
Disabling all skinning for Blender in per-application settings fixes the issue so the problem is likely to be with WindowBlinds.
I wanted to make Stardock aware of the issue but if they want to look into it or not is up to them.
OS: Windows 10 Pro 64-bit Build 10586
GPU: AMD Radeon HD 7970, Driver: 16.150.2401.0
I recently updated my graphics drivers to the latest release but I was having this issue from before the upgrade.
I also have two displays.
Screenshot: http://s26.postimg.org/yhk7q40ex/Blender.jpg