I migrated from my old 2013 intel iMac that was running Parallels and Windows 10 flawlessly, to a 2026 M4 Mac Studio. I paid for Parallels 26. It won't install Windows. It won't finish setting up the virtual machine and is stuck in a loop of returning the same error message, "There is no operating system installed in this virtual machine." Parallels support is so far absent and not helpful. I use software for design for my small business and right now it looks like my Parallels was a wasted purchase.