What Is Pagefile.sys And Can I Delete It !free! May 2026

If you’ve ever turned on "Show hidden files" in Windows, you might have noticed a mysterious, massive file on your C: drive called pagefile.sys . It sits there, often taking up several gigabytes of space, with no obvious purpose.

If disk space is that tight, it’s time for a bigger drive—not a missing page file. Have you ever run into “out of memory” errors? Check your page file settings before you blame your RAM. what is pagefile.sys and can i delete it

Here’s the short answer: