Game suddenly wont launch

[Flamezz|Ninja]

I'm not entirely sure whats happening. I was just playing not even two hours ago with out any problems. I can load the launcher just fine. i click a server, click join game, the mouse hesitates for a second with the loading icon and then.. nothing. nothing happens. the game just doesnt even launch. But for some reason the launcher itself thinks that it has. It says in the bottom corner "the game is running" but it isnt. I even look at the task manager and there is no game running. I tried joining servers, i even tried just clicking launch game and nothing happens. It's not even creating any new log file or anything.

heres a picture:

http://imgur.com/ZIHCBsA

as you can see it thinks the game is running but it isnt.

I did not install anything new in the intervening time. however after it stopped working i did a restart and there was some windows updates

edit: i tried multiple servers

[Ryz]

Check if there is still a process of UDK running in the background, or restart? Had this myself and it solved it. Hope it works for you!

[Flamezz|Ninja]

It seems to have magically resolved itself. so..... i guess problem solved?

[kenz3001]

building shaders most likely

[Flamezz|Ninja]

It actually seems to be a recurring issue. I have to go in to task manager and end the UDK program and then it will work.