The creators of Java have a helpful web tool that can be used to verify if your Java is working correctly and offer a seamless method of updating if needed.

1. To verify if you have Java, start at the java.com website
2. Select the Do I have Java?
   
   
   
   
3. Click on the red Agree and Continue button
   
   
   
4. If your Java is up to date, no changes are necessary. If not, you can download and install the latest version of Java by clicking Download Java Now
5. Once you are finished updating, make sure to check that any previous versions were uninstalled

To install Java:

1. Start by visiting the java.com website
2. Choose the Free Java Download option
3. Select Agree and Start Free download
4. You can either open or save the install file. If you choose to save it, locate the installer in your Downloads folder after the download is complete and double-click the file.
5. Allow the program to make changes

Once the download is finished and the installation begins, make sure to clear the check box for the installation of the Ask.com Toolbar.

Once the installation is complete, restart your computer.

If you need to install Java on your Mac, check out this guide from Java's help site!

Having multiple versions of Java can cause conflicts that result in both versions not working. To resolve any potential conflicts, make sure that your computer only has the latest version of Java installed. You can check which version(s) of Java you have by viewing your installed Programs and Features in the Control Panel.

1. First, let's go to Start and click Control Panel
2. Inside of the Control Panel, select Programs and Features
3. Here, we'll want to locate the older versions of Java to uninstall
4. Right-click on the previous version and click Uninstall. Alternatively, you can also press the Uninstall button at the top after selecting the older version

If there are other pieces of software you'd like to remove for your computer, check out our guide on uninstalling programs and applications on your computer.