Intel ICPS disrupts IPv6 on some Windows laptops
Some users saw empty OneDrive and OneNote notebooks despite an "Up to date" status. Their laptops still had working IPv4 connections, but websites and Microsoft 365 services reached over IPv6 failed.
In one comparison, ICPS build 40.25.926.0 completed 138 of 170 IPv6 connections; the generic 50.26.623.243 build completed 169 of 170.
Two OEM builds linked to the failures
A Samsung Galaxy Book owner traced the problem to ICPS version 40.25.926.0. Removing it and installing generic release 50.26.623.243 restored normal operation. An ASUS user reported similar trouble with version 40.25.725.165, with 40 to 60 percent of IPv6 HTTPS connections to an AWS CloudFront distribution reset. Version 40.25.926.173, also linked to an OEM variant of the component, was distributed through Windows Update.
That difference offers a useful diagnostic clue: a laptop can appear online while services reached over IPv6 fail. An independent technical investigation linked the behavior to `IntcCo11X64.sys` version 11.5.11.19, an ICPS driver that operates through Windows Filtering Platform.
The analysis found that the IPv6 Flow Label was zeroed in TCP packets after a connection had been established. That change can interfere with routing through cloud infrastructure. IPv4 has no Flow Label field. The technical findings reported by The Register describe tests in which disabling related traffic-control components restored the label. In a separate test, all 10 of 10 connections succeeded after a related service was disabled.
ICPS remains part of the OEM software bundle on some Dell laptops. That distribution does not establish that every device, or every ICPS installation, is affected.
A separate Windows software failure involving an update was reported in another Windows case. The reports here point specifically to ICPS builds on affected OEM devices.
Update or remove the suite
Intel Customer Support confirmed that the wireless driver and ICPS are separate standalone packages. A technician told the ASUS user that ICPS "is often bundled with OEM systems as an added value software to enhance the overall wireless experience." The Microsoft Update Catalog distributes the problematic OEM builds, according to the report.
Intel's generic ICPS package 50.26.623.243 is available for Windows 10 and Windows 11. Its description refers to functional updates but makes no claim about fixing IPv6 or Flow Label handling.
As of October 2026, no public advisory from Intel or Microsoft about the behavior had been located. The Intel Community discussion presents the Flow Label explanation as an independent diagnosis, not a result confirmed by either company.
ICPS uses separate services. These include `INTCCoSvc` and Intel Dynamic Bandwidth Management, along with Intel Connectivity Network Service and IntelConnect Service. Intel says ICPS and the wireless driver are distributed as separate packages, so uninstalling the suite does not require removing the Wi-Fi driver.
Users facing unexplained IPv6 failures can check installed programs for ICPS, then install the generic version or uninstall the suite. The wireless driver continues to work without ICPS.
