Windows stopped with an UNEXPECTED_KERNEL_MODE_TRAP (bug check 0x0000007F) because the Intel or AMD CPU generated a trap (an internal processor exception) that the Windows kernel was unable to catch. The first parameter in the crash dump identifies the specific CPU trap type. The most common causes are hardware faults — defective memory, CPU issues, or incompatible hardware — though driver bugs can also trigger this stop code.
Faulty RAM is generating CPU trap exceptions — this is the most common hardware cause.
CPU overclocking or aggressive voltage settings are causing processor instability.
A recently installed hardware component (GPU, storage controller, RAM) is incompatible or faulty.
A kernel-mode driver has a double-fault condition (trap type 0x8) caused by a stack overflow or invalid memory access.
The CPU itself is failing or encountering thermal throttling that causes it to generate unexpected traps.
Incompatible BIOS/UEFI settings or outdated firmware is causing CPU or memory bus instability.
How to fix it
Check the first parameter of the bug check in the minidump to identify the CPU trap type (e.g., 0x00000008 = double fault, 0x0000000D = general protection fault). This helps narrow the cause.
Run MemTest86 from a USB boot for at least two full passes. Any memory errors confirm RAM as the cause — test modules individually.
Disable all CPU and memory overclocking in BIOS/UEFI and reset to default settings. Disable XMP/EXPO profiles as a test.
Check CPU and system temperatures under load using HWiNFO64. Address any thermal issues.
Update BIOS/UEFI firmware from the motherboard manufacturer. Known CPU compatibility or stability fixes are often included in BIOS updates.
Run Driver Verifier (`verifier.exe`) to identify any kernel-mode drivers with memory access problems contributing to the trap.
Run `sfc /scannow` and `DISM /Online /Cleanup-Image /RestoreHealth` to repair corrupted system files.
