Hello folks,
The policy agent is an IPSec service residing on each Windows machine. Internet Protocol security (IPsec) supports network-level peer authentication, data origin authentication, data integrity, data confidentiality (encryption), and replay protection.
Please follow the following steps to stop/start IPsec:
Press windows+R combination of key to open run program.
Type services.msc and press Enter.
Locate IPsec Policy Agent observe his current status and open(double click) to make changes.
To finish press ok button and close Services window.
That's all, Enjoy !! :)