A bad file in a Cloudmark anti-spam tools update installed recently is causing Outlook to crash. Logs will show an error in NTDLL.DLL and you may have some installer errors.
If you are affected, you won't need to uninstall Cloudmark to fix the problem – download an update containing the fix. See
//www.cloudmark.com/desktop/forum/viewtopic.php?t=1062 for more information.
Published August 9, 2007. Last updated on May 15, 2011.
![Diane Poremsky [Outlook MVP]](http://www.outlook-tips.net/images/2014/MVP_BlueOnly.png)