Focus on the IMAGE_NAME and STACK_TEXT sections. These point directly to the culprit.
Example output:
MODULE_NAME: y81drv
IMAGE_NAME: y81driver.sys
FAILURE_BUCKET_ID: AV_y81driver!unknown_function
This suggests a custom driver named y81driver.sys is unstable. y81 dump file
A y81 dump file is a binary snapshot of a process’s memory space, CPU registers, and stack traces at the moment of a critical failure. The "y81" designation is not a universal standard (like Windows .dmp files) but rather a proprietary naming convention. Based on forensic analysis of systems where this file appears, the "y81" suffix typically originates from one of three origins: Focus on the IMAGE_NAME and STACK_TEXT sections
Unlike a minidump (which saves only essential information), the y81 dump file is typically a full user-mode dump, meaning it can be several hundred megabytes or even gigabytes in size. This suggests a custom driver named y81driver
binwalk -Me y81_dump.bin
Once you identify the cause via WinDbg, apply the appropriate fix.