Use the exact error code and failed KB or package name. A general installation code does not identify one universal failed part.
Windows cannot reach the requested shared computer, server name, or folder path. The name, network profile, sharing service, firewall, or host availability may be wrong.
Error 0x80070002 commonly appears when Windows Update cannot find files it expects in the update cache or servicing process.
Error 0x80070005 usually means the update process cannot access a required file, folder, registry entry, or Windows component because permission was denied.
Error 0x80070422 often appears when Windows Update or a dependent service cannot start because it is disabled, blocked by policy, or damaged.
Error 0x80070643 is a general installation failure that can involve a specific update package, Windows servicing, Microsoft Defender definitions, or an application installer.
Error 0x800F081F usually means Windows servicing could not find compatible source files needed to repair or enable a component.