Windows BSOD Error 0x000001C6 — FAST_ERESOURCE_PRECONDITION_VIOLATION Fix

What Does This Error Mean?

The 0x000001C6 blue screen means a kernel-level synchronization resource was used in an incorrect way by a driver or software component. This is called FAST_ERESOURCE_PRECONDITION_VIOLATION. It is almost always caused by a buggy third-party driver. The fix involves identifying and removing the problematic driver.

Affected Models

Windows 10
Windows 11
Windows Server 2019
Windows Server 2022

Common Causes

Faulty or incompatible third-party driver violating kernel synchronization rules
Recently installed software or hardware driver that has a bug
Antivirus or security software with a driver that conflicts with other system components
Outdated chipset, network, or storage drivers from hardware manufacturers
Windows system file corruption affecting kernel synchronization libraries

How to Fix It

Read the blue screen message carefully. 0x000001C6 crashes usually name the driver file that caused the fault (e.g., something ending in .sys). Note the driver name — it tells you which software or hardware to investigate.

If you cannot read the screen before it restarts, Windows saves a crash dump file. You can read it using WhoCrashed (free tool at resplendence.com/whocrashedinstall).
Update all drivers. Prioritize chipset drivers, network adapter drivers, storage controller drivers, and any recently installed hardware drivers. Get chipset drivers from your motherboard manufacturer (Intel, AMD, or your laptop brand's support page).

Device Manager shows outdated drivers with yellow warning icons, but not all outdated drivers show a warning — it is worth checking your hardware manufacturer's site directly.
Check recently installed software and drivers. Go to Control Panel > Programs and Features > Sort by Install Date. Look for anything installed around the time the crashes started. Uninstall recent drivers, utilities, or software to see if the crashes stop.

Hardware monitoring tools, RGB lighting software, and gaming utilities frequently install background drivers that can cause BSOD issues.
Run Windows SFC (System File Checker). Open Command Prompt as Administrator and type: sfc /scannow — press Enter. This scans for and repairs corrupted Windows system files that could cause kernel errors.

SFC takes 10–20 minutes. Let it complete without interruption. Restart after it finishes.
Try a clean boot to isolate the cause. Search 'msconfig' in the Start menu, open System Configuration, go to the Services tab, check 'Hide all Microsoft services,' then click 'Disable all.' Restart. If crashes stop, a third-party service or driver is the cause — re-enable services one by one to narrow it down.

Clean boot is the most reliable way to isolate driver and software conflicts causing BSODs.

When to Call a Professional

This BSOD requires some technical investigation to identify the responsible driver. If you are not comfortable with driver troubleshooting, a Windows technician can analyze the crash dump file to identify the exact cause. Remote support sessions are available from many tech support services.

Frequently Asked Questions

What does kernel synchronization mean?

The Windows kernel (the core of the operating system) uses synchronization objects to manage access to shared resources — like memory and hardware. Drivers must follow strict rules when using these objects. When a driver breaks the rules — accessing a resource in the wrong order or from the wrong context — Windows detects the violation and triggers a BSOD to prevent data corruption.

How do I find which driver caused 0x000001C6?

The best way is to analyze the crash dump file. Windows saves a minidump file in C:\Windows\Minidump each time a BSOD occurs. Download and run WhoCrashed (free) — it reads the dump file and usually identifies the faulty driver by name in plain English. This is the most efficient way to identify the responsible component.

Can antivirus software cause this BSOD?

Yes. Antivirus and security software install deep kernel drivers that monitor all system activity. These drivers are sometimes involved in kernel synchronization violations. If the BSOD started after installing a new antivirus product, try temporarily uninstalling it to see if crashes stop. If they do, contact the antivirus vendor — they typically release patches quickly for known BSOD issues.