Computers & printers troubleshooting

Windows printer randomly prints POST /ipp/print HTTP/1.1 or Keep-Alive pages

Microsoft documented a Windows issue where some USB-connected dual-mode printers that support both USB Print and IPP over USB unexpectedly printed raw IPP headers and random characters. Pages often began with POST /ipp/print HTTP/1.1, Connection: Keep-Alive, or Windows Internet Print Provider. Microsoft resolved the known issue in later Windows updates.

Reviewed Sep 29, 20265 minute guideWindows printerWindows PCs with USB-connected dual-mode printers; the documented Microsoft issue affected specific 2025 Windows update builds
Quick answer

If the unwanted page begins with POST /ipp/print HTTP/1.1, Connection: Keep-Alive, Content-Type: application/ipp, Windows Internet Print Provider, or Host: localhost, it matches a Windows USB/IPP symptom Microsoft documented. Install current Windows updates first; the known issue was resolved in later servicing updates. If a fully updated PC still does it, then check the queue, port and driver rather than assuming the historical bug remains.

Start here: Match the printed header before changing printer settings. If the unwanted page begins with POST /ipp/print HTTP/1.1, Connection: Keep-Alive, Content-Type: application/ipp, Windows Internet Print Provider, or Host: localhost, it matches the symptom Microsoft documented.
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Guided check

Match the symptom, then work through the safe checks.

0/4 checked

1. What best matches what you observe?

2. Complete only the checks that are safe for you.

Do not weaken print security or uninstall current updates blindlyOld forum workarounds can target historical builds and may remove security fixes. On managed PCs, use the organization's Windows Update and printer-management policy instead.Professional
4 user-level checks are available in this guide.Stop immediately if any warning condition applies.
Show stop conditions
  • The proposed fix requires removing current security updates or weakening Point and Print policy without administrator approval
  • The printer is managed by an organization and driver or Windows Update changes are centrally controlled
  • The printer starts producing abnormal heat, electrical odor, repeated hardware faults, or other symptoms unrelated to the documented IPP text issue

Likely causes

  • The PC is still on an affected Windows build that contains the documented USB Print / IPP over USB issue
  • A dual-mode USB printer is receiving IPP protocol data as printable content instead of handling it as protocol traffic
  • Windows Update is incomplete, paused, managed, or missing the later fix that contains Microsoft's resolution
  • If the PC is already fully current, a separate driver, queue, port, spooler, or printer-firmware problem may be producing similar output

Quick checks, in order

Match the printed header before changing printer settings

If the unwanted page begins with POST /ipp/print HTTP/1.1, Connection: Keep-Alive, Content-Type: application/ipp, Windows Internet Print Provider, or Host: localhost, it matches the symptom Microsoft documented.

safe

Install current Windows updates

Microsoft resolved the known Windows 11 issue in updates released from KB5053657 onward. Install the latest cumulative update offered for your supported Windows version rather than removing security updates as a first-line fix.

safe

Restart Windows and power-cycle the printer once

After Windows Update completes, restart the PC fully, turn the printer off, reconnect it normally, and check whether the unsolicited pages return.

safe

If fully updated, inspect the printer queue and driver path

Confirm the printer uses the correct current manufacturer driver or supported Windows class driver and that there is not a duplicate or stale queue using an unexpected IPP port.

caution

Do not weaken print security or uninstall current updates blindly

Old forum workarounds can target historical builds and may remove security fixes. On managed PCs, use the organization's Windows Update and printer-management policy instead.

Professional

Does the printed page match the historical Windows IPP bug?

The page starts with POST /ipp/print and Windows Internet Print Provider

Check Windows Update history and install the latest supported cumulative update. This closely matches Microsoft's documented symptom.

The PC is fully updated but the raw pages continue

Do not assume the old Windows bug is still the cause. Inspect duplicate queues, port type, driver choice, printer firmware, and whether another PC reproduces it.

Only one managed PC or print server is affected

Compare its update level, printer queue, driver package, and print policy with a working device before changing organization-wide settings.

Stop and get qualified help when

Do not continue troubleshooting if any of these apply:
  • The proposed fix requires removing current security updates or weakening Point and Print policy without administrator approval
  • The printer is managed by an organization and driver or Windows Update changes are centrally controlled
  • The printer starts producing abnormal heat, electrical odor, repeated hardware faults, or other symptoms unrelated to the documented IPP text issue

Official support and model manuals

Use the full model number from the rating label. The manufacturer manual is the deciding reference when codes differ by region or product family.

Frequently asked questions

Why is my printer printing POST /ipp/print HTTP/1.1 and Keep-Alive text?

Microsoft documented a Windows issue affecting some USB-connected dual-mode printers where IPP protocol data was printed as raw text. The output could include POST /ipp/print HTTP/1.1, Connection: Keep-Alive, Content-Type: application/ipp, Windows Internet Print Provider, and Host: localhost.

Was the Windows Internet Print Provider random-page problem fixed?

Yes. Microsoft marked the known Windows 11 issue resolved in KB5053657, released March 25, 2025, and says later Windows updates include the resolution. The corresponding Windows 10 issue was also addressed in later servicing updates.

Should I roll back Windows to stop the random printer pages?

Not as the default fix now. Historical forum posts discussed rollbacks while the bug was active, but Microsoft's documented resolution is to install the later update containing the fix. If a current fully patched PC still has the symptom, investigate the queue, port, driver, and printer separately.

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