Microsoft has acknowledged that Windows 10 users may see error 800B0100 (TRUST_E_NOSIGNATURE) while installing certain apps from the Store and is working on a fix.
https://www.thurrott.com/windows/windows-10/173514/microsoft-reprocessing-store-apps-to-fix-error-0x800b0100
https://www.thurrott.com/windows/windows-10/173514/microsoft-reprocessing-store-apps-to-fix-error-0x800b0100