KB5001638 Failed To Install Posted on by Webmaster IT Support Forum › Forums › Windows › Windows Server 2019 › KB5001638 Failed To Install Tagged: 0x80070541, KB5001638 This topic has 0 replies, 1 voice, and was last updated 2 years, 6 months ago by Webmaster. Viewing 0 reply threads Author Posts March 19, 2021 at 2:39 pm #2436 WebmasterKeymaster When trying to install KB5001638, I get this error: 2021-03 Cumulative Update for Windows Server 2019 (1809) for x64-based Systems (KB5001638) – Error 0x80070541 Does anyone know anything about that? Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In