You may need to download and run a cleanup utility for your previous security application in order for it to be completely removed.
Caution When you remove Internet security programs, your computer is unprotected.
If you have problems installing Endpoint Protection after you remove existing Internet security programs, contact Windows Defender or Endpoint Protection support by submitting a case online (for more information, see How to Submit a Case Online).
C:\Program Files\Symantec\Symantec Endpoint Protection Manager\bin Type the following commands: lucatalog -cleanup lucatalog -forcedupdate Step 5) Apply latest certified definitions.
Move the file previously downloaded into this folder (or the relevant folder for the installation) C:\Program Files\Symantec\Symantec Endpoint Protection Manager\data\inbox\content\incoming File will be processed, and within a few minutes virus definitions will be updated on the EPM Console and to the respective clients.
If you have firewalls or proxies in your network environment, whitelist the required URLs.
If the database server is out of space or if the table used to store definitions has reached its quota, there will likely be error messages in the Windows Event Logs.
For an example, please see Could not allocate space for object 'dbo.