Comprehensive and Detailed Explanation From Exact Extract:

The Windows swap file, or page file, is a system file used to extend physical memory by storing data that cannot fit into the RAM. When RAM is full, the OS swaps inactive data pages to this file, thus augmenting RAM capacity.

It does not replace bad sectors; that function is for disk management utilities.

It is not primarily for security but for memory management.

It is not reserved exclusively for system files but is used dynamically for memory paging.

Microsoft's official documentation and forensic guides like NIST SP 800-86 describe the page file's role in virtual memory management and its importance in forensic analysis because it may contain fragments of memory and sensitive information.