System Power Settings
A lot of systems are by default configured to go into power saving mode after being idle for some time. Make sure that your Power Saving options are turned off
Network Interface Controller Power Settings
Apart from the general system power saving options, your network controller may also be configured to turn off after some time to save power. To make sure this does not happen, follow the steps below:
- From Start, search for Device Manager
- On the Network adapters dropdown, locate and double-click your actual network controller
- Go to the Power Management tab, and uncheck the "Allow the computer to turn off this device to save power" option.