Net+framework+49+offline+installer+for+windows+exclusive

You need the —a standalone package that doesn't require a web handshake to work.

: Installing unofficial framework updates can break existing applications that rely on precise registry keys and system DLLs. No Official Support net+framework+49+offline+installer+for+windows+exclusive

He double-clicked it.

Delete the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Services\Pending (backup first) or simply restart the machine. You need the —a standalone package that doesn't