ASHWID API Fails to Retrieve BIOS UUID After 2-3 Minutes Post-Reboot

Hello @Xie Steven ,

I attempted to reproduce the issue but could not observe the same behavior. Could you please provide:

• Screenshots taken immediately after reboot and again after 3–5 minutes, showing whether the BIOS component is present or missing
• Windows version and OS build
• Device manufacturer and model
• BIOS/UEFI version
• Any error message or HRESULT received

Please redact any device identifiers or other sensitive information from the screenshots.

Windows version and OS build：Windows11 25H2(26200.8875)

Device manufacturer and model：Manufacturer NEC Model PC-V1MT5HZHT

BIOS/UEFI version：SMBIOSBIOSVersion R3JET30W(1.05) Version NEC - 1050 ReleaseDate 2026/07/06 9:00:00

I tested it using the following code:

When the value is successfully retrieved, the API returns:

03009AE708004BD005003A07050022200500E2300500DC3B0500724D0500EC550500D08B0500FCBD05003ACA050008DD060001000400A6220400493104004EBA01007EA402003CF9090004BC

When the value cannot be retrieved, the API returns:

03009AE708004BD005003A07050022200500E2300500DC3B0500724D0500EC550500D08B0500FCBD05003ACA050008DD060001000400A6220400493104004EBA040052EE01007EA402003CF9

IBuffer nounce = null;
HardwareToken packageSpecificToken;
packageSpecificToken = HardwareIdentification.GetPackageSpecificToken(nounce);
var hardwareresult = BitConverter.ToString(packageSpecificToken.Id.ToArray()).Replace(MarkConstant.Hyphen, string.Empty);

Strangely, when I disable a network adapter, the value retrieved by this API returns to normal.

Hello @Xie Steven ,

Thank you for the additional information. The comparison shows that when the issue occurs, an additional network component appears in the ASHWID while the BIOS component is no longer included. Disabling the network adapter restores the previous result.

This indicates that the behavior is related to ASHWID hardware enumeration or hardware drift rather than the BIOS UUID becoming unavailable.

Could you please confirm which network adapter must be disabled and provide its driver version? Please also check whether updating the network adapter driver or BIOS changes the behavior.

As ASHWID may change when hardware components are enabled or disabled, we recommend not relying solely on its BIOS component as a permanent device identifier.

Please redact the complete ASHWID values from the public post.