New to this forum.. Nice meeting you everyone! did you guys encountered this error? - Error 1722. There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor.- ...and then after I click ok, the installation rolled back. This error has occured whenever I installed the Minitab 15 English in a Windows 7 or Windows Vista OS based computer. Q: It's incompatibility, right? So, is there a version of Minitab that is compatible with Windows 7 and Windows Vista? I really need this application. Any idea or information will much be appreciated. Thanks in advance .