I just reinstalled Mac OS and Parallels after erasing my Mac's disk. Everything is the latest version and up-to-date (Mac OS 10.13.2 High Sierra, Parallels Desktop for Mac 13.2.0, Windows 10). Internet access is via Ethernet to my Apple Thunderbolt Display to MacBook Pro. Internet access is about 20x slower under Windows than the Mac OS. For example, running SpeedTest.Net on Mac Chrome shows download speeds at about 70 Mbps. On Windows Chrome the download speed is about 3 Mbps. The 20x difference is dramatic, and painfully slow under Windows. In the Parallels hardware configuration tool, I'm not using any network conditioning. I get similar results whether I'm using Shared Network or Bridged Network. Any suggestions?