The Windows stop code UNEXPECTED_KERNEL_MODE_TRAP (0x0000007F) means: The processor raised a trap that the Windows kernel could not handle, often a hardware or overclocking problem. This code often points to hardware, disk or startup problems. Back up important files as soon as you can and follow the steps below; if it keeps returning, have the PC checked.
Is it serious? Can I keep using my PC?
This code often points to hardware, disk or startup problems. Back up important files as soon as you can and follow the steps below; if it keeps returning, have the PC checked.
Common causes
- Hardware fault (processor, motherboard, power supply)
- Faulty or incompatible RAM
- Overclocking, overheating or unstable power
How to fix it
- Restart the PC. If the blue screen happened only once and does not return, no further action is usually needed
- Reset any overclocking or XMP/EXPO profile to default and check temperatures and cooling
- Test the RAM with Windows Memory Diagnostic (mdsched.exe)
- Disconnect recently added hardware and external devices, then restart
- Run the PC or component maker's hardware diagnostics; the part may need repair or replacement
Frequently asked questions
What does UNEXPECTED_KERNEL_MODE_TRAP mean?
The Windows stop code UNEXPECTED_KERNEL_MODE_TRAP (0x0000007F) means: The processor raised a trap that the Windows kernel could not handle, often a hardware or overclocking problem.
Is UNEXPECTED_KERNEL_MODE_TRAP serious?
Severity: High. This code often points to hardware, disk or startup problems. Back up important files as soon as you can and follow the steps below; if it keeps returning, have the PC checked.
How do I fix UNEXPECTED_KERNEL_MODE_TRAP?
Start with these steps: Restart the PC. If the blue screen happened only once and does not return, no further action is usually needed; Reset any overclocking or XMP/EXPO profile to default and check temperatures and cooling; Test the RAM with Windows Memory Diagnostic (mdsched.exe); Disconnect recently added hardware and external devices, then restart; Run the PC or component maker's hardware diagnostics; the part may need repair or replacement.