The Motorola Xoom is running on the Android firmware 3.0. If you want to update your Motorola Xoom tablet's firmware, here is how to do.
1. Touch Apps > Settings > About tablet > System updates.
2. If there is a new available firmware, click to download the installation.
3. Xoom may ask if you want to proceed, select "install". Xoom will automatically install the update.
Make sure NOT press any button when the Xoom tablet is uploading.