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Qualcomm Usb Driver Digital Signature -

If you see “No digital signature found,” repeat the process with a different driver version.

bcdedit /set testsigning off

signtool sign /v /fd SHA256 /a /t http://timestamp.digicert.com qcser.sys qualcomm usb driver digital signature

Bookmark the Microsoft Update Catalog search for “Qualcomm USB” and check every 6 months for new signed versions. If you see “No digital signature found,” repeat

If you successfully install an official driver, you will see the device listed in Device Manager without any yellow warning triangles, and the "Driver Digital Signature" error will be non-existent. try these official methods:

If you prefer not to use Test Mode every time, try these official methods:

If you see “No digital signature found,” repeat the process with a different driver version.

bcdedit /set testsigning off

signtool sign /v /fd SHA256 /a /t http://timestamp.digicert.com qcser.sys

Bookmark the Microsoft Update Catalog search for “Qualcomm USB” and check every 6 months for new signed versions.

If you successfully install an official driver, you will see the device listed in Device Manager without any yellow warning triangles, and the "Driver Digital Signature" error will be non-existent.

If you prefer not to use Test Mode every time, try these official methods: