Apr 21, 2021 · Update 2: SHA-2 Related Servicing Stack Updates. Apply this update in order the Windows Update servicing stack could validate SHA-2 signatures and direct affected Windows devices to communicate with the SHA-2 based service endpoints of Windows Update. Feb 04, 2011 · TheITBros.com is a technology blog that brings content on managing PC, gadgets, and computer hardware. We enjoy sharing everything we have learned or tested.