Windows cannot connect to System event notification Service

Barrier phenomenon:
power-on prompt: "Windows cannot connect to the System Event Notification Service services, which prevents standard users from logging on to systems." As an administrator user, you can review the system event log for more information about why this service is not responding.
Reason Analysis:
This is mainly due to the fact that the user has used antivirus or optimized software to optimize the system to cause this problem.
Solution:
Restart the computer press F8 into Safe mode, and then Win+r, then appear in the window input cmd return, and then type the command command netsh winsock reset catalog, and then enter, restart the computer, and so on after the normal startup of the system, enter the password into the Win7 system can be.