An anonymous reader writes "Yesterday afternoon, Kaspersky Labs released a definition update that blocked all Internet and Intranet access on Windows XP workstations. While there has been no official communication from Kaspersky, their forum is lit up with angry customers relying on each other to find a fix."
Update: 02/05 16:42 GMT
: Thanks to an anonymous reader, who says that Kaspersky has issued a statement, and a fix
(though the fix takes some manual labor to implement).