Instead of clicking "Download with Manager" on Nexus, try the Manual Download . Once downloaded, drag the archive directly into MO2’s "Downloads" tab or install it from a file.
Temporarily turn off your antivirus and try the extraction again. If it works, you know the antivirus was the gatekeeper. 2. Administrator Permissions
It is highly recommended to keep your MO2 installation and your game libraries outside of protected Windows folders. Try moving them to a root directory like C:\Games\ . 3. Corrupt Downloads