This issue started when our third party support changed the subnet (192.168.0.0/23) of our network since there are few IP addresses left. All of our workstations here are currently running on Windows 7 64-bit and now some of it have ARP.exe running on the task manager and it consumes a huge amount of CPU usage.
We've already restarted our unmanaged Cisco Switches to flush the ARP tables but still the issue persist. No VLANs in the switches.
We have 170 workstations here and 20 or more workstations have the issue.
Hope you guys help me out here.