It's definitely a registry problem: the software was deleted and uninstalled by you, but there's one last thing to do: delete the registry entries. The registry is like the archive of your organization (your computer is your organization), it keeps the file of each of your employees, when you enter the organization to create a file, and leave the organization is to remove your file. You install the software is added to the registry of a project, uninstalled without uninstalling the registry (you may not have used 360, 360 in the prompt) now you want to install a similar software, like a section chief of your unit is gone, but the archives did not give him to remove the file, the new one to apply for a new job, the unit to look at the file, not lack of ah, surely will not be arranged to do the chief of the section. You have to find the corresponding registry entries, delete it