Hi Farid,
I would suggest below steps to try it out but I did not understand your motive to get uninstall the agent. As you are working on DLP, you must know the methods that required to install and uninstall. I am not pointing out but little confuse about your cause of the issue
- Install the Syamantec DLP agent completely again and if this succesfull, reboot and try to unstall again with same setup
- If above fails then delete the registry keys of DLP from regedit. and try to install/uninstall again.
- If above again fails then try to remove manually by following below commands
https://www-secure.symantec.com/connect/forums/uninstall-dlp-agent
https://www-secure.symantec.com/connect/forums/symantec-dlp-agent-uninstallation
https://www-secure.symantec.com/connect/articles/preparing-dlp-agent-uninstallation-password
4. Speak with Syamntec Support , they might provide you the CleanAgent.exe tool to remove