Symantec Endpoint Protection (SEP) client for Windows has one or more definition issues, such as:
Note: To quickly check if this issue still exists or has been resolved on the computer, download and run SymDiag.
Corruption of virus definitions may have many causes. Consider these questions when responding to potentially corrupted content definitions:
If the known or suspected cause is not anticipated to recur, you can clear corrupted definitions by uninstalling and reinstalling SEP. Alternately, you can manually clear definitions as explained in the following article:
If the cause is not known, clearing the definitions can be a useful troubleshooting step.
If the problem reoccurs on one or more computers, identifying the root cause is a priority. A fix of the root cause prevents repetition of the procedure for clearing corrupted definitions.
Consider the following when attempting to identify the cause for recurring definition corruption:
If a cause cannot be found or addressed and the issue repeats itself, contact Technical Support.