Press Windows key + R
Type msinfo32 and press Enter
Check BaseBoard Manufacturer, BaseBoard Product, and BaseBoard Version
Open Command Prompt
Type wmic baseboard get product,manufacturer,version,serialnumber and press Enter
Open PowerShell
Type Get-CimInstance Win32_BaseBoard | Format-List Product,Manufacturer,Version,SerialNumber and press Enter
Open the computer case and look for the motherboard model printed on the board
Check the motherboard box or purchase receipt
Check the system manual or manufacturer support page
Use a hardware info tool such as CPU-Z, HWiNFO, or Speccy