Final answer:
The Pagefile.sys file is used by Windows operating systems as virtual memory to support physical RAM. Microsoft.com is the best source for information on Pagefile.sys because it's the official website from the creators of Windows.
Step-by-step explanation:
The Pagefile.sys file is a system file in Windows operating systems that acts as virtual memory when the physical RAM is full. When RAM runs out of memory to perform tasks, Windows moves some of the data to the pagefile.sys to free up RAM and keep the system running smoothly.
The Microsoft.com website is considered the best source for information about Pagefile.sys because it is the official website for Microsoft, the developer of Windows operating systems. On Microsoft.com, you can find authoritative, detailed, and up-to-date information about their products, which is provided by the experts who create and maintain the OS.