Forum Discussion

DannyD's avatar
DannyD
Copper Contributor
Jun 15, 2026

Windows security mitigations blocking multiple apps

Hello, As of a couple days ago, the steamwebhelper.exe was getting suspended by windows defender. A simple restart of steam would allow me to quickly open a game before it was suspended again (typically 30 seconds). Digging through forums I've tried everything recommended (whitelisting the .exe in windows defender, running as admin, deleting cef.win64 and cef.win7x64 as well as the webhelper app, disabling gpu acceleration, disabling web browser sandbox, uninstalling and reinstalling steam, and verifying windows, re-installing windows). (current event viewer error:

"Process '\Device\HarddiskVolume7\steam\bin\cef\cef.win64\steamwebhelper.exe' (PID xxxxx) was blocked from making system calls to Win32k.sys." Im not sure what to try at this point, any help is appreciated, and no i dont have any ASUS software on my pc as it seems that was a common cause.

It is now also blocking Razer apps and Opera GX. Please help as i can barely use any apps.

Windows version: 25H2, OS Build: 26200.8655

Hardware:

CPU- Ryzen 5 7600x

Motherboard- Asrock B650E PG Riptide

RAM- 32gb teamgroup DDR5

GPU- MSI Radeon RX 6950XT

Storage- 1 Samsung 970 EVO Plus 2TB, 2 Samsung 980 Pros

1 Reply

  • Jlaysia's avatar
    Jlaysia
    Copper Contributor

    The most probable cause is a conflict with gaming or hardware monitoring tools that use low-level drivers (like WinRing0). These are known to trigger Windows security blocks .