0x00000033 fix guide: find the real crash cause first
If you are troubleshooting a BSOD with 0x00000033, start by checking the on-screen stop label and any minidump details, then match that with when the crash happens: during boot, right after sign-in, or later during normal use. That timing usually tells you whether to start with recent driver or security-software changes, Windows file repair, or hardware checks.
Definition: Officially, the UNEXPECTED_INITIALIZATION_CALL bug check has a value of 0x00000033. (Microsoft Learn)
Methodology note: Check recent changes, Reliability Monitor, Event Viewer, and C:\Windows\Minidump before making broad changes. If you need adjacent walkthroughs, see our BSOD driver rollback guide, Safe Mode steps, SFC and DISM repair guide, System Restore guide, and antivirus removal guide.
Reviewed by experience: The steps here stay with standard Windows recovery actions and the limited evidence available for this stop code. Published: 2026-09-22. Updated: 2026-09-22.
What usually causes 0x00000033?
Start with the simplest split: did the crash begin right after a change, or did it appear without one? On many PCs, the most practical first checks are drivers, security software, Windows file corruption, storage health, and memory.
Ranked causes to check first
- Faulty or recently changed drivers. Start with Device Manager: press Windows + X > Device Manager, open System devices, IDE ATA/ATAPI controllers or Storage controllers, and Network adapters, then inspect any recently updated chipset, storage, or network driver. Microsoft’s primary Device Manager guidance also documents updating, uninstalling, and rolling back drivers in the Driver tab workflow.
- Third-party antivirus or endpoint protection. If the crash started soon after you installed, upgraded, or reconfigured a security product, test that change first by using a clean boot and, if needed, uninstalling the product so its drivers no longer load with Windows.
- Damaged system files or component store issues. Use System File Checker first, then DISM if SFC reports unrepaired files or the crash started after an update, following Microsoft’s repair order for corrupted system files and Windows images. (Microsoft Support)
- Disk problems. Storage trouble is a realistic possibility when Windows crashes during startup, file access, or repair attempts. A failed drive self-test and follow-up disk checks were reported in one similar case, along with advice to run the proper drive diagnostic (reported by bleepingcomputer.com).
- Memory problems. RAM issues are another possibility in random or inconsistent crashes; that was suggested in a separate similar thread (reported by bleepingcomputer.com).
- A recent change worth rolling back. If the crash started right after a driver, Windows update, or security product install, use rollback before broad repair.
How machine type changes the odds
Machine role still matters, but recent changes matter more. A home PC that crashes during boot usually points first to a driver, startup software, storage trouble, or damaged Windows files. A managed work PC may also be affected by endpoint software or deployment changes. Use the machine’s recent history to set the order of checks.
Decision table: which fix to try first
Use the table as a quick triage guide. Begin with the branch that matches the timing of the crash and what changed just before it started.
Triage map
| System pattern | Crash timing | Recent change? | Practical clue | Try first | Next move |
|---|---|---|---|---|---|
| Ordinary Windows 10 or 11 endpoint | At boot or before desktop | Yes: driver, VPN, AV, endpoint agent | Started right after software or driver installation | Device Manager rollback/update for chipset, storage, network | Safe Mode, then uninstall the recent security or driver package |
| Ordinary endpoint | After sign-in, within minutes | No clear change | Reliability Monitor shows app or driver failures before BSOD | Clean boot with msconfig | SFC first, then DISM if corruption signs appear |
| Any system | During startup repair or file access | No | Disk errors, failed checks, or repeated startup repair loops | Run chkdsk and the manufacturer’s drive diagnostic | Back up files and stop stressing the disk if health checks fail |
| Domain-joined endpoint with many agents | After sign-in or during policy/application startup | Yes: security or management agent changed | Crash began after the agent update or policy rollout | msconfig clean boot | Uninstall the suspect agent as a proper driver-level test |
| Any system | Random, mixed timing | No | Minidump stack names one third-party module | Remove or replace that driver/software first | Run SFC first and DISM second only after the suspect is removed |
| Any system | Started right after Windows servicing | Yes: update or failed repair | SFC errors, CBS entries, unstable service startup | sfc /scannow | DISM /Online /Cleanup-Image /RestoreHealth, then System Restore if recent |
Can faulty drivers trigger 0x00000033?
Yes. On many systems, drivers are one of the best first checks, especially if the BSOD appears at boot, right after sign-in, or soon after a driver change.
Driver path: rollback or update the right classes
- Open Device Manager: Windows + X > Device Manager.
- Check System devices for chipset-related entries, then Storage controllers or IDE ATA/ATAPI controllers, then Network adapters.
- For a recently changed driver, open Properties > Driver and select Roll Back Driver if available. If rollback is unavailable, select Update Driver or Uninstall Device, then reboot and load the vendor package. Microsoft documents the same rollback path in Device Manager’s driver properties workflow.
- Open Control Panel > Security and Maintenance > Maintenance > View reliability history. Look for a red X before the crash and match it to the driver install time.
What to check in logs and dumps
Use Event Viewer > Windows Logs > System and review events in the crash window. Then check C:\Windows\Minidump for fresh dump files. In WinDbg, confirm the bugcheck and note any faulting module name. If one vendor module appears repeatedly, remove or update that suspect before you run broad file repair. If you need a fuller rollback workflow, use our BSOD driver rollback guide.
Can antivirus or security software cause 0x00000033?
Yes. Security suites and endpoint agents can load early in startup and install drivers or filters that affect normal Windows operation. If the crashes started after a security product change, test that first.
Service and security-agent isolation
- Open System Configuration: press Windows + R, type msconfig, press Enter.
- Open the Services tab, check Hide Microsoft services, then click Disable all for non-Microsoft services that are not required for your work. Leave core business tools alone unless you know they are part of the problem. That hiding step matches Microsoft’s clean boot guidance for isolating software conflicts.
- Reboot and retest by repeating the action that usually triggers the BSOD, such as signing in, waiting for startup apps to finish, or opening the program that previously caused the crash.
- If a third-party antivirus or endpoint product is suspected, remove it from Settings > Apps > Installed apps in Windows 11 or Settings > Apps > Apps & features in Windows 10, then reboot and confirm in Task Manager > Startup, Services, or Device Manager that its related entries are gone before retesting.
When uninstall is better than disable
Disable switches often leave drivers and filters in place. Uninstall is the better test when the product is a realistic suspect. If the machine is domain-joined, coordinate with enterprise IT before removing the agent so policy or tamper protection does not reinstall it immediately. If you want the longer workflow, use our antivirus removal guide.
Should I run SFC or DISM for a 0x00000033 BSOD?
Run SFC first when logs, recent updates, or failed servicing point to corruption, and follow with DISM if SFC finds damage it cannot repair.
