How to fix Error 751 on Windows 11

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Windows 11 Error 751: Page Fault Satisfied by Secondary Storage Device

Why This Error Happens

Error 751 in Windows 11 is typically an informational or warning-level event indicating that a memory page requested by a process was not found in physical RAM and had to be retrieved from the page file on disk instead. This is a normal virtual memory operation, but frequent occurrences usually point to insufficient physical RAM, a fragmented or misconfigured page file, or a failing/slow secondary storage device (HDD/SSD) struggling to keep up with paging requests. In more severe cases, it can indicate memory pressure caused by too many background processes or driver-level memory leaks.

Step-by-Step Resolution Guide

  1. Check available physical memory: Open Task Manager (Ctrl+Shift+Esc) → Performance tab → Memory. If usage is consistently above 80-90%, consider closing memory-heavy applications or adding more RAM.

  2. Optimize the paging file: Go to Settings → System → About → Advanced system settings → Performance Settings → Advanced tab → Virtual Memory → Change. Uncheck “Automatically manage paging file size,” select your system drive, choose Custom size, and set an appropriate Initial/Maximum size (typically 1.5x your RAM for Initial, 3x for Maximum).

  3. Move the page file to a faster drive: If your OS is on an HDD, relocate the page file to an SSD (if available) using the same Virtual Memory settings above—select the SSD drive letter and configure the custom size there instead.

  4. Run a disk health check: Open Command Prompt as Administrator and run:

   chkdsk C: /f /r

Restart when prompted. Also run:

   winsat disk -drive c

to assess drive performance and rule out a failing disk.

  1. Update storage drivers: Go to Device Manager → expand Disk drives → right-click your storage device → Update driver. Also check your motherboard/SSD manufacturer’s website for updated AHCI/NVMe controller drivers.

Alternative or Verification Steps

  • Verify the fix: Open Event Viewer (eventvwr.msc) → Windows Logs → System, filter for Event ID 751, and monitor whether occurrences decrease after applying the changes above.
  • Alternative fix: If the issue persists on an HDD-only system, consider upgrading to an SSD, as mechanical drives are significantly slower at handling page faults and are the most common root cause of this error.