Below is detailed information on individual STOP errors for STOP code 0x121 through STOP code 0xC0000221, including what each STOP code means.
If you're looking for a STOP code outside of this range, please see my Complete List of STOP Codes from 0x1 to 0xC0000221.
If I have additional troubleshooting tips on a particular STOP error then I've provided a link to that information.
STOP Error 0x00000121: DRIVER_VIOLATIONSTOP error 0x121 means that a driver has caused a violation. STOP code 0x00000121 may also display "DRIVER_VIOLATION" on the same STOP message.
STOP Error 0x00000122: WHEA_INTERNAL_ERRORSTOP error 0x122 means that an internal error in the Windows Hardware Error Architecture (WHEA) has occurred. STOP code 0x00000122 may also display "WHEA_INTERNAL_ERROR" on the same STOP message.
STOP Error 0x00000124: WHEA_UNCORRECTABLE_ERRORSTOP error 0x124 means that a fatal hardware error has occurred. uses the error data that is provided by the Windows Hardware Error Architecture (WHEA). STOP code 0x00000124 may also display "WHEA_UNCORRECTABLE_ERROR" on the same STOP message.
STOP Error 0x00000127: PAGE_NOT_ZEROSTOP error 0x127 means that a page that should have been filled with zeros was not. might occur because of a hardware error or because a privileged component of the operating system modified a page after freeing it. STOP code 0x00000127 may also display "PAGE_NOT_ZERO" on the same STOP message.
STOP Error 0x0000012B: FAULTY_HARDWARE_CORRUPTED_PAGESTOP error 0x12B means that a single-bit error was found in this page. This is a hardware memory error. STOP code 0x0000012B may also display "FAULTY_HARDWARE_CORRUPTED_PAGE" on the same STOP message.
STOP Error 0x0000012C: EXFAT_FILE_SYSTEMSTOP error 0x12C means that a problem occurred in the Extended File Allocation Table (exFAT) file system. STOP code 0x0000012C may also display "EXFAT_FILE_SYSTEM" on the same STOP message.
STOP Error 0x1000007E: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_MSTOP error 0x1000007E means that a system thread generated an exception which the error handler did not catch. STOP code 0x1000007E may also display "SYSTEM_THREAD_EXCEPTION_NOT_HANDLED_M" on the same STOP message.
STOP Error 0x1000007F: UNEXPECTED_KERNEL_MODE_TRAP_MSTOP error 0x1000007F means that a trap was generated by the Intel CPU and the kernel failed to catch this trap. STOP code 0x1000007F may also display "UNEXPECTED_KERNEL_MODE_TRAP_M" on the same STOP message.
STOP Error 0x1000008E: KERNEL_MODE_EXCEPTION_NOT_HANDLED_MSTOP error 0x1000008E means that a kernel-mode program generated an exception which the error handler did not catch. STOP code 0x1000008E may also display "KERNEL_MODE_EXCEPTION_NOT_HANDLED_M" on the same STOP message.
STOP Error 0x100000EA: THREAD_STUCK_IN_DEVICE_DRIVER_MSTOP error 0x100000EA means that a thread in a device driver is endlessly spinning. STOP code 0x100000EA may also display "THREAD_STUCK_IN_DEVICE_DRIVER_M" on the same STOP message.