Develop a troubleshooting guide specifically for the most common issues users face with [Software]. Organize the guide by error codes and scenarios, providing clear solutions, screenshots, and video tutorials where necessary. The guide should also include preventative tips to avoid these issues in the future and offer additional resources for in-depth support, such as knowledge base links and contact information for higher-level technical support. Ensure that each troubleshooting step is actionable and concise. The final guide should be available both as a web page and a downloadable PDF.