Sub : Unexpected shutdown in IPC with Zenon 6.51 and 7.20.(Windows 7 Ultimate, Windows 8)

We are facing unexpected reboot in IPC with zenon software while running the machine/IPC. Its interrupts the production activity.

Can anyone please guide us, how can we diagnose the issues related with Zenon runtime or Windows OS or IPC hardware ?

If i check the event viewer of OS, i am getting the message like below,