A few users are getting error while in GroupWise:

"GroupWise is not properly Installed.The attachment control component could not be initialized. Please run GroupWise Setup, or contact your system administrator."

when we click Ok, we get another error:
"Attachment control interface version does not match!"

The work around:

I uninstall GroupWise if possible. 4 out of 5 times it's not available in "Add Remove Programs" to uninstall. I then reinstall GroupWise and all is better.