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Microsoft Office v. X contains a network-aware anti-piracy mechanism that detects other copies of Office v. X using the same Product Identifier (PID) on the network. If it detects a duplicate PID on the network, Office will shut down. It is possible to send a certain type of malformed announcement to the PID Checker service that will cause the service to fail. If the service fails, Office will also shut down, possibly resulting in a loss of any unsaved data. Restarting Office will allow normal operation to resume.

Microsoft Office v. X contains a network-aware anti-piracy mechanism that detects other copies of Office v. X using the same Product Identifier (PID) on the network. If it detects a duplicate PID on the network, Office will shut down. It is possible to send a certain type of malformed announcement to the PID Checker service that will cause the service to fail. If the service fails, Office will also shut down, possibly resulting in a loss of any unsaved data. Restarting Office will allow normal operation to resume.