: If you can boot into Windows, press the Windows Key , type System Information , and look for the BaseBoard Product field.
Finding the right drivers for these legacy Intel boards requires identifying the actual model name (e.g., DH61BE or DG41TY) and understanding Intel's current support for discontinued products. Identifying Your Intel Desktop Board Model
If you are seeing the code on your Intel motherboard, you might be looking for a specific driver to get your system working. However, it is important to clarify that "21 B6 E1 E2" is not a motherboard model number; it is a series of BIOS Post Codes that often appear on the board's diagnostic display during the boot process.