Due to the various manufactures some will not have this feature listed in Device Manager

Open Device Manager

Search for Device Manager and open the application.

Expand Network Adapters.

Look for a Wireless Adapter (note you will see something different).

Right click on your wireless adapter and select Properties.

We do not have an image example for the next steps.

Look for a tab called Power Management.

Toggle off the option ‘Allow the computer to turn off this device to save power’.