"If you encounter a loss of files after updating in the fall of October 2018, please call our support hotline. They have the tools to get you back in good shape."
Now, Microsoft has updated its supporting documents and recommended users.Minimize the use of affected equipment.. If you lose data after installing it, you can contact the company's support team to recover the file:
"if you manually check and update and believe that you have lost files after the update, try to minimize the use of affected devices and contact us directly through 1-800-MICROSOFT, or find your local service number in your area."
Dona Sarkar explains that opening the personal document folder allows you to check that files have been deleted after you install Windows 10 October 2018 Update. If all your files still exist, you can start using them without taking any action. But if the file disappears, it is recommended that you minimize the use of the device and contact Microsoft directly through 1-800-MICROSOFT.