The microsoft account signature is MicrosoftSignature. Network definition: Microsoft signature, Microsoft signature. Microsoft digital signature is used to distribute to various drivers and plug-ins running in Windows system. Common needs of Microsoft digital signature are: various drivers, kernel drivers, etc. If such files do not have Microsoft's digital signature, they will not be installed and run directly. It is worth noting that before 202 1, you can apply for code signing certificate to issue code signing certificate recognized by Microsoft, such as DigiCertGlobalSign and Entrust. However, starting from 202 1, Microsoft will no longer recognize the use of the driver digital signature newly signed by the third party code signing certificate, but will need to use WHQL authentication to obtain the official digital signature issued by Microsoft.