A common problem regularly happened to me while working with SharePoint , the service suddenly stopping, such problem like search service or other services, raise the error message (Error 1069: The service did not start due to a logon failure).
Suppose you have tried to search within you SharePoint site and you know that everything is working well, and you have tested the service before.
after while you tried to search for something and you discovered that it was stopped so let’s make it work again,actually i have tried many diagnostics but no way, the only and simple solution is:
Open services.msc from run command, then choose the search service as it was stopped, right click it and then choose proprieties , then choose login and change the login password, and confirm it, like the picture below:
Now try to right click the service and choose start and i hope it will run with you and work correctly.