Since Windows 10 is still work in progress, it shouldn't be such a big shock to see an app crash all of a sudden, but it appears that build 9879 comes with what could be a widespread bug affecting a significant number of users.

Many of those who have gaming platform Steam installed on their Windows 10 build 9879 machines have discovered that Valve's app crashes every once in a while for no clear reason, no matter if it's launched in compatibility mode or not.

At this point, there's absolutely no workaround available for this problem, and a Microsoft engineer has acknowledged the issue but has recommended users to launch the app in Windows 8 compatibility mode or update the display adapter drivers.