Medium
Operating Systems
✓ Solution Verified by Community (0+ upvotes)
How to fix error error-instruction-misalignment in Windows 11
ERROR_INSTRUCTION_MISALIGNMENT = 549
Fix based on community reports and expert analysis. Last verified: 2026-08-12
· How we verify fixes
| Error Code | error-instruction-misalignment |
|---|---|
| Affected System | Windows 11 (Microsoft) |
| Difficulty | Medium |
| Estimated Time | 30 min |
| Requires Admin Rights | ⚠️ Yes |
| Requires Reboot | 🔄 Yes |
Solution Steps
- 1 Press Windows key + R, type 'mdsched.exe', and press Enter. Choose 'Restart now and check for problems'. Windows will restart and run a memory test. This checks for faulty RAM, which can cause misalignment errors. The test may take 20-30 minutes.
- 2 If the memory test finds no issues, update your device drivers, especially graphics and chipset drivers. Press Windows key + X, select 'Device Manager', expand 'Display adapters', right-click your GPU, and select 'Update driver'.
- 3 Run the System File Checker: Open Command Prompt as administrator and type 'sfc /scannow'. This repairs corrupted system files that might cause misalignment.
- 4 If the error occurs in a specific application, check for updates or patches for that application. Developers often fix alignment bugs in updates.
- 5 If the problem persists, try disabling any overclocking (if you have overclocked your CPU or RAM). Overclocking can cause memory instability.
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