Ask Ubuntu and Ubuntu Forums are great sources of answers to common questions about installing, troubleshooting and optimizing Ubuntu. And if you want to speak with the www.uhh3o.cnmunity directly, try one of these IRC channels.
Use Launchpad to add your support question. Keep your query active until you get an answer or browse and search historical questions and answers.
Keep your system up to date with the Ubuntu security notices that affect the current supported releases of Ubuntu.