If you have a Wacom tablet, this problem unfortunately is a know issue from Microsofts WPF framework and the Wacom drivers.
To get around this please consult the following pages containing the steps to disable the "Windows Ink" feature.
http://superuser.com/questions/81209/visual-studio-2010-breaking-wacom-intuous-tablet
http://viziblr.com/news/2013/6/23/the-windows-and-wacom-tablet-nightmare-is-over.html