I have updated NIC drivers to latest one, also uninstalled and reinstalled SNMP service but no improvement.
Any ideas guys?
Check to make sure that any Antivirus firewall is not blocking UDP 161, this can occur if the antivirus thinks its flooding the port. For Windows Servers and Desktops, I recommend that you use WMI Active Directory Accounts to monitor the systems instead.
Windows firewall is disabled. I am using Kaspersky for anti-virus, UDP 161 is opened. I have turned off kaspersky and run a test for several days. Same problem, SNMP service droppes out and requires restart to make it work again.
I don't know if i can use WMI monitoring because i have several custom pollers for my servers.