"Invalid Digital Signature" when updating

If the auto-updater fails with:

Invalid Digital Signature — The downloaded update isn't signed with a valid signature.

it means Windows itself could not validate that the installer was signed by a trusted certificate authority. SoundSwitch deliberately refuses to run an installer that fails signature verification.

Most common cause

Your version of Windows no longer receives the root certificate updates required to validate the signature.

This typically happens on:

• Windows 7 and earlier (end of life).
• Windows 10 below 21H1 (also out of support for certificate updates).

How to fix it

1. Update Windows to a supported release. Windows 10 21H1+ or Windows 11 will receive the certificate updates needed to validate the installer.
2. As a workaround, you can also download the installer manually from the SoundSwitch website and run it. If Windows still complains, the underlying certificate trust problem must be resolved first.

SoundSwitch supports Windows 10 or newer (x64 or ARM64). Older systems are no longer covered.

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Source: #952