Select File|Options from the menu to set the options for the Windows GUI:

For the Refresh Interval choose a value that fits to the sensor intervals that you use. We recommend to use the same interval here as you do for most sensors (e.g. 60 seconds if most of your sensors work with a 60 second interval). Try to choose a longer period to minimize the bandwidth usage. Whenever a change in the network status is discovered by the server you have the choice between four means of notification by the Windows GUI (also the notifications by the server (e.g. via email or ICQ) still apply):
IPCheck Server Monitor makes it easy and affordable to detect network and website failures early. IPCheck Server Monitor helps organizations monitor critical network resources and immediately detect system failures or performance problems to minimize downtimes and avoid economic impact.