McAfee comes unstuck over signature updates
As a result of two bug-ridden signature updates to McAfee's anti-virus software, some customers have found themselves unable to access the internet. The updates can either disable anti-virus monitoring or result in an unresponsive program console. According to McAfee, the defective signatures, DAT 6807 and 6808, were distributed last weekend.
http://www.h-online.com/security/news/item/McAfee-comes-unstuck-over-signature-updates-1674793.html