You cannot remove this form from your computer by using InfoPath because it was installed by using a custom installation ...

You cannot remove this form from your computer by using InfoPath because it was installed by using a custom installation program.To remove the form: -  Open Microsoft Windows Control Panel, double-click Add or Remove Programs, click the name of the form, and then click Remove.If the form does not appear in the list, you may have installed it by using a script. -  If you installed the form by using a script, you can remove it by running the script again.    To do so, click Run on the Start menu, locate and select the script (.js) file, and then click Open.    After the name of the file, type a space, followed by /uninstall, and then click OK.