Splunk Universal Forwarder not monitoring WindowEvent Security logs suddenly

[shivakarnati]

The Splunk Universal forwarder is stopped forwarding windows Event Security logs,
After check the system logs we came to know that the system time has changed and at that point of time the Splunk UF is not stopped the forwarding. Please help me how to troubleshoot and I have done the following.

1) I restarted the Splunk Universal Forwarder
2) I deleted inputs.conf file and again added that file.

[shivakarnati]

The Splunk Universal forwarder is stopped forwarding windows Event Security logs,
After check the system logs we came to know that the system time has changed and at that point of time the Splunk UF is stopped the forwarding. Please help me how to troubleshoot and I have done the following.
1) I restarted the Splunk Universal Forwarder
2) I deleted inputs.conf file and again added that file.

[p_gurav]

Please check _internal index for any error.