I have been notified that an was discovered this week that may cause issues for all Business Portal installations.  There is an issue with Internet Explorer where it closes unexpectedly.  As Business Portal users move throughout the system, they may see BP shut down or pop up an error on the mshtml.dll file.  There has been a hotfix released for the IE issue.

https://mbs.microsoft.com/customersource/support/knowledgebase/hottopics/HOT_TOPIC_IEHotfix_KB923996.htm