If you encounter the "Error loading operating system" problem when starting up the computer, try the methods above to troubleshoot it. This post provides you with six practical methods for resolving the problem. Using a dependable tool like EaseUS Partition Master is always a good choice for Windows beginners to fix various startup issues with ease. It has multiple features that can fix your computer and bring it back to its usual state. In addition, it is highly recommended to back up all your important data to avoid potential data loss.