Per default Windows configuration, pagefile is located in the root of the c:\ drive, hidden as a system file.
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The default behavior of a Windows machine is to manage the page file. In some cases the pagefile configuration can be set to just 1 GB. This document explains how to set the pagefile to be automatically managed by the operating system.

1. Launch command prompt as an admin and run the following command: 

wmic computersystem where name="%computername%" set AutomaticManagedPagefile=True

Note: it's a single line command to be run at once

2. Restart the server