I too, have this very same issue, and found no solution(s) via Google.
Seems like when opening a Explorer window (file manager type, not IE), and clicking on a drive to view or navigate files, this crash happens. Mostly it is via a right click of a file or folder.
First the screen "blows-up", meaning all icons disappear, only desktop color is on screen, and slowly it rebuilds itself, losing some icons in the taskbar (systray), and all settings for any Quick Launch are gone, which means they have to be turned back on.
This happens from time to time.
I have also verified the file associated with the explorer.exe crash is NERODIGITALEXT.DLL.
What is the file for? I'm assuming the "exr" means or eludes to extension.
I have all of the newest Nero installed, it started with v6.6 and also the 220.127.116.11.
If the file is renamed, what may be assumed will not work or what association is compromised by renaming it?