~20 minutes for a complete upgrade is impressive to say at least if that&#x27;s true.<p>I upgraded at a 500 Mbps line with i7-4930k CPU and a OCZ Revodrive 3 x2 PCI SSD. I didn&#x27;t pay full attention to it but my download&#x2F;installation took about 2 hours IIRC.
I do have two other HDDs though, so Windows 10 may have spent some time indexing files which increased the installation time.<p>Also did the upgrade at a clients computer, typical low-end consumer Toshiba laptop at a 15 Mbps line, it took about 6-7 hours.