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OS_DATA_TAMPERING
Operating-system data tampering
OS_DATA_TAMPERING is bug check code 0x00000155.
This bug check belongs to OS integrity protection. It indicates that protected system data was modified or failed validation in a way Windows treats as tampering.
How to read the parameters
- The dump, stack, and integrity component involved decide whether the issue is memory corruption, malicious modification, boot/integrity policy, or a faulty security driver.
- It is different from ordinary access denied errors because protected OS data has already failed integrity expectations.
- Recent kernel drivers and security products are important evidence.
What to check in the dump
- Check Secure Boot, VBS/HVCI, kernel-mode security products, recent driver installs, and memory corruption signals.
- Preserve the full dump; minidumps may not contain enough memory around the protected data.
- Do not “fix” by disabling protections before identifying the component that wrote or corrupted the data.
References
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