According to user reports, the “Classic Shell needs to configure itself for the new operating system” error message often occurs after… — According to user reports, the “Classic Shell needs to configure itself for the new operating system” error message often occurs after upgrading from Windows 8.1/8/7 to Windows 10. Here is a true example from the answers.microsoft forum. I have a computer running windows 10 (upgraded from Win 8.1), and I…