Botched McAfee update shutting down corporate XP machines worldwide

A bad McAfee for Windows XP update is causing computers worldwide to shut down. Apparently DAT update 5958 deletes the svchost.exe file, which then triggers a false-positive in McAfee itself and sets off a chain of uncontrolled restarts and loss of networking functionality.

Basically, the computer reboots over and over. Not good.