Some folks get mad when I suggest this, but when you have 'crashes' it's a very good idea to run SFC /scannow command from TERMINAL (run as admin). I do this after every crash or bizarro thing and often finds something to fix in the Windows permissions and so forth. If already doing so, pardon the intrusion :)
simchris
I run that command relatively infrequently, but when I do, it
almost always finds something, and almost never fixes anything that I am trying to fix. SFC finding a problem is probably most likely tied to some update that did not apply correctly.