PROFILER_CONFIGURATION_ILLEGAL (0x17B)
What is this error?
A processor performance counter configuration is invalid. Usually caused by BIOS or hypervisor misconfiguration.
Common causes
- BIOS misconfiguration
- hypervisor conflict
- virtualization software bug
- CPU microcode issue
How to fix it
- Update BIOS
- check virtualization settings
- update CPU microcode via Windows Update
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
Bug check 0x0000017B (PROFILER_CONFIGURATION_ILLEGAL) occurs when the processor's performance monitoring counters are in an invalid state. This can happen when: BIOS sets up CPU performance counters incorrectly, a hypervisor (Hyper-V, VMware, VirtualBox) conflicts with Windows profiling, or CPU microcode is outdated. Less commonly seen in gaming systems unless virtualization-based security (VBS) or Hyper-V is enabled. Fixes:
- Update BIOS to latest version for microcode updates,
- Install all Windows Updates (they include CPU microcode patches),
- If running VMs: update virtualization software (VMware, VirtualBox),
- Disable Hyper-V if not needed: optionalfeatures.exe → uncheck Hyper-V,
- Disable virtualization-based security: gpedit.msc → Device Guard → Turn Off.
When to seek help
If this error keeps happening after trying the fixes above, it may point to a deeper hardware or system issue. Consider professional help if:
- The crash occurs across multiple games or applications
- You see the same error after a clean Windows install
- Your PC is less than a year old (could be a warranty issue)
- You smell burning or hear unusual sounds from your PC
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