A server was recently updated with the latest antivirus definitions. Immediately after the update， the server begins to report file not found errors for a mission critical application. Which of the following is the MOST likely reason for this？（）

A.The update was done incorrectly and now the server needs to be restarted.

B.The update has discovered viruses on the server and removed those virus files.

C.The update requires a reboot for the files to process correctly.

D.The update has quarantined files that are false positives.