Onenote Error is usually caused by misconfigured system files that create registry errors within your operating system. Windows errors can cause program lock-ups, slow PC performance, system crashes, computer freezing and more. Scan and repair any missing or damaged Windows registry files using RegCure Pro. After the registry issues are resolved, it is recommended to optimize your PC by removing any spyware, adware and viruses with SpyHunter. If you are still experiencing the issue after applying this fix read comments on this forum http://www.filerepairforum.com/forum/microsoft/microsoft-aa/onenote/717-how-to-repair-corrupt-onenote-files