If the uninstall applet does not appear within a minute Java may be disabled in the browser, or you may have chosen not to run the Java detection application in the security prompt. You can check if Java is enabled by going to the Verify Java Version page.
In Windows 10, the Edge browser does not support plug-ins and therefore will not run Java. Switch to a different browser (Firefox or Internet Explorer 11) to run the Java plug-in. Select the More Actions option located at the top right of the Edge browser and click on Open with Internet Explorer. More info
The Chrome browser does not support NPAPI plug-ins and therefore will not run all Java content. Switch to a different browser (Firefox, Internet Explorer or Safari on Mac) to run the Java plug-in. More info
Multiple UAC (User Account Control) Dialogs As removing Java from your computer requires administrative permissions, Windows might trigger a warning requesting permission to run as an administrator for each one of the Java versions that are to be removed. More info