I have Windows XP running under Parallels 10.2.1 (and Yosemite on the Mac side). I want to remove XP and install Windows 10 on the Parallels side. What are the steps to do that? I don't have any Windows programs to worry about. This would be a clean install.
@MelanieH1, if you would like to completely remove your Windows XP Virtual machine please perform the steps from this KB article. Also please upgrade your Parallels Desktop to the latest build - 10.2.2 (29105) After all of this steps you will be able to install the Windows 10 like you installed Windows XP before. For more information please check this article