USB Library
Minimum Driver Signature Requirements

Minimum Driver Signature Requirements 

 

Full driver package WHQL signatures are the best and most trusted by all versions of Windows. Windows allows the installation of properly WHQL signed drivers, without producing a prompt warning the user about the driver’s trustworthiness. 

 

However, current Windows versions do not require WHQL signatures to allow installation. Lesser signatures (or no signatures in some cases) are allowed, but will generate user dialogs/warnings during the installation process. 

 

Operating System 
Minimum Signature to Allow Installation 
Windows 2000 
None 
Windows XP 32-bit 
None 
Windows XP 64-bit 
None 
Windows Vista 32-bit 
None 
Windows Vista 64-bit 
Embedded 
Windows 7 32-bit 
Embedded 
Windows 7 64-bit 
Embedded 
Windows 8 32-bit 
Embedded 
Windows 8 64-bit 
Embedded + Full package authenticode 
Windows RT (ARM) 
Third party drivers and driver packages are not currently allowed. All USB devices for this OS must use Microsoft supplied drivers. 
MLA - USB Library Help Version : 2.16
http://www.microchip.com/mla