**System Information**
Windows 64bit, 4096 MB
GeForce GTX 760/PCIe/SSE2, 4.5.0 NVIDIA 352.86
**Blender Version**
Broken: 2.75 (sub 0), branch b'master', commit date b'2015-06-19' b'14:59', hash b'c85a58a', b''
**Short description of error**
Windows crashes when draging properities panel to open it
**Exact steps for others to reproduce the error**
Based on a (as simple as possible) attached .blend file with minimum amount of steps
# open .blend file
# click on the properities panel edge and drag it to open it (see attached image)
# the Windows OS crashes and I have to reboot
# I can reproduce the crash on my system
{F196846}
{F196848}