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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteIf a Windows PC running CrowdStrike Falcon is repeatedly restarting with a blue-screen error 0x50 or 0x7E, use Windows Recovery to start Safe Mode and remove the matching CrowdStrike driver files. Microsoft also offers a recovery tool that can automate the repair. These steps target the documented CrowdStrike Windows endpoint issue—not blue screens with unrelated causes.
Check whether this repair fits your symptoms
Microsoft describes affected CrowdStrike Falcon endpoints encountering error 0x50 or 0x7E on a blue screen and continually restarting. Its guidance covers Windows 10 and Windows 11. Microsoft Support’s KB5042421 says: “These endpoints might encounter error messages 0x50 or 0x7E on a blue screen and experience a continual restarting state.” If your error or circumstances do not match, do not treat this targeted file-removal procedure as a general BSOD fix.
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Option 1: Remove the matching files from Safe Mode
This manual route uses Windows Recovery on the affected PC. You will need a local administrator account to run the commands in Safe Mode. If Windows sign-in is available, use this path to open recovery:
- At the sign-in screen, hold Shift while selecting Power > Restart.
- In Windows Recovery, select Troubleshoot > Advanced options > Startup Settings, then choose the option to enable Safe Mode. A BitLocker recovery prompt may appear.
- In Safe Mode, open an elevated Command Prompt. Confirm the drive letter where Windows is installed; the commands below use C: as Microsoft’s example.
- Run these commands to list and remove only files matching Microsoft’s specified pattern:
CD C:WindowsSystem32driversCrowdStrike
dir C-00000291*.sys
del C-00000291*.sysIf Windows is on another drive, replace C: with its actual letter in the first command. Check that the listed files match C-00000291*.sys; do not delete other files from the folder. Restart the PC after removal. Microsoft’s full manual guidance is in KB5042421.
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Option 2: Use Microsoft’s recovery tool
If manual repair is impractical, Microsoft’s KB5042429 recovery tool can run remediation either from Windows PE boot media or through a Safe Mode boot. The choice depends on your access, BitLocker configuration, and whether you can prepare recovery media.
| Route | Administrator access | BitLocker considerations | Setup |
|---|---|---|---|
| Manual Safe Mode | Local administrator account needed for elevated commands. | Recovery may ask for a key; outcome depends on the protector configuration. | Use Windows Recovery on the affected PC and remove the matching files. |
| Tool: Safe Mode | Local administrator account required. | May avoid entering the key with some configurations; TPM+PIN may still require the PIN or recovery key. | Use the recovery tool to configure Safe Mode and run its repair script. |
| Tool: Windows PE | Microsoft says local administrator privileges are not required. | BitLocker-encrypted systems may require manual recovery-key entry. | Boot the affected PC from prepared Windows PE media. |
Prepare recovery media safely
- Microsoft specifies a 64-bit Windows client with at least 8 GB of free space and administrator privileges to create the media.
- A USB drive is optional, but if used Microsoft specifies a capacity from 1 GB through 32 GB. The creation process formats it and erases its existing contents, so use a spare drive without needed files.
- Some devices may need hardware-specific drivers. To boot from USB, use the manufacturer’s instructions; the boot-menu key may differ from F12.
Microsoft says its recovery tool is intended to expedite administrator repair and recommends testing it on multiple devices before broad deployment. For the exact download and procedure, follow Microsoft’s recovery-tool instructions.
Before choosing a route, account for BitLocker and access
Find the BitLocker recovery key before starting a route that could request it. Microsoft says Safe Mode recovery may work without entering the key with TPM-only protectors, unencrypted disks, or when the key is unknown; TPM+PIN protection may still require the PIN or recovery key. Windows PE may require the recovery key on an encrypted device. These are configuration-dependent outcomes, not a way to bypass encryption.
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For an organization-managed PC, contact the employer’s, school’s, or organization’s IT administrator for the recovery key, administrator access, and approved steps. Microsoft points organization users to their account or device portal for recovery keys. Do not guess credentials or attempt to bypass BitLocker.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Alternative: try System Restore
Microsoft’s manual guidance also documents System Restore from Windows Recovery. Microsoft says the restore process may take up to 15 minutes and that personal data should not be impacted; that description is not a guarantee for every device or configuration. Use the recovery options in Microsoft’s KB5042421 guidance.
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