A number of Windows 10 users (edit: also Windows 8.1 and several other versions are affected) have reported crashing in Dream Seeker due to a patch that was put out today. Here's more information that shows the exact same crash is impacting many more people:
http://community.skype.com/t5/Windows-desktop-client/ Windows-10-Skype-keeps-crashing-seconds-after-starting/td-p/ 4242892
Per the instructions in that thread, I would advise removing the patch KB3132372 until such time as Microsoft puts out a new one. Also make sure that Flash for Internet Explorer is up to date.
More information and other user solutions can be found in id:2007764.
Microsoft is now aware of the issue and is researching it alongside Adobe. Hopefully they'll have a fix for this post haste.
https://forums.techguy.org/threads/ kb3132372-update-for-adobe-flash-player-w10-version-1511.116 3325/
Dec 29 2015, 7:25 pm (Edited on Jan 1 2016, 9:05 pm)