Debian :: Can't Kill Zombie Process

Sometimes (rarely) when I try to open VLC it wont open, but it stays in the background and takes 98-100% of one core.

The problem is that I can't kill that vlc-process.

Code: Select allkillall vlc
will NOT kill it
and
Code: Select allkill 31641
won't work either

top shows
Code: Select allPID       USER      PR  NI  VIRT        RES     SHR     S    %CPU   %MEM     TIME+     COMMAND
31641  xxxxxxxx   20   0   1320248   64384  39120   S   100.0         1.6     44:51.94     vlc

Is there any way to kill the vlc-process (without booting the machine)? I also tried the "killall vlc" and "kill 31641" as root with the same results.

I have Debian jessie and the only "nonofficial" repositories I have enabled are

#google chrome
http://dl.google.com/linux/chrome/deb stable main
#Backports
deb http://httpredir.debian.org/debian jessie-backports main

And from those I have installed only chrome, and wine-development, and I dont think those could have anything to do with this problem.

Booting the machine does work, but I don't want to boot my machine just now. This happens about once per week