A workaround to fix the BSOD caused by CrowdStrike's faulty update involves booting Windows in Safe Mode and deleting the security firm's “C-00000291*.sys” file
The VergeTom Warren
Context & Ripple Effects
The incident began with a defective CrowdStrike update taking Windows systems offline across sectors that depend on endpoint protection. The available recovery path shifts the problem from identifying the cause to restoring individual machines.
Related coverage says the Falcon update put affected devices into a boot loop, while the remediation was later described as difficult to automate across large fleets. That makes operational recovery—not merely issuing a corrected update—the immediate constraint.
First-order effects
IT teams must boot affected Windows devices into Safe Mode and remove the specified CrowdStrike file before those machines can return to service.
Organizations with large Windows estates face a labor-intensive recovery process; CrowdStrike’s faulty update directly disrupts customers relying on its Falcon software.
Second-order effects
Businesses that depend on affected endpoints must prioritize device access and restoration, extending disruption where machines cannot be reached or handled individually.
The outage sharpens scrutiny of endpoint-security deployment controls, because software granted deep OS access can turn a bad configuration into a broad availability failure.
Third-order effects
If similar incidents recur, enterprises may demand more staged rollouts, rollback mechanisms, and isolation between security-agent updates and critical operations.
The episode is part of a wider tension in action-level security: the tools empowered to stop threats can also create concentrated operational risk when their updates fail.
The trend: Endpoint security is becoming a resilience issue as much as a defense capability, pushing customers to weigh deep system access against recoverability.
How to fix the Crowdstrike thing: 1. Boot Windows into safe mode 2. Go to C:\Windows\System32\drivers\CrowdStrike 3. Delete C-00000291*.sys 4. Repeat for every host in your enterprise network including remote workers 5. If you're using BitLocker jump off a bridge
Currently wondering why enterprises globally update a “.sys” file without an airgapped test prior to deployment. Speed? Confidence because “it never happened before”? @CrowdStrike
null pointers strike again! looks like the crowdstrike issue is a dereferenced null pointer that's trying to access null memory using the ‘mov r9d, dward ptr r[8]’ assembly operation. brutal. [image]
Some people report that the files responsible for the CrowdStrike crashes (Eg. C-00000291-00000000-00000032.sys) are full of zeroes. This is not the case for any of the machines I fixed by hand today. One example is
A whole lot of people are learning some hard lessons on process and procedures today. Have empathy for those dealing with this mess; many have asked for changes that would have helped with this and were told no.
Here's a FIX for the Blue Screen of Death for both Windows and Mac users! #BSOD $CRWD Windows: 1. Boot into safe mode 2. Go to C:\Windows\System32\drivers\Crowdstrike directory 3. Delete C-00000291*.sys 4. Restart (credit @MacPaw) Mac: 1. Don't worry. You're not impacted 😂💯🖥️ [im…