The method of searching historical documents in Boao can be decided according to different situations. First of all, we need to be clear about the reasons. Historical files may be lost or deleted for various reasons, such as misoperation, virus attack, hard disk failure, etc. For different reasons, you can take the following methods to retrieve historical files:

1. Recycle Bin Recovery: If the file is deleted by mistake, you can check the recycle bin of the computer first. In the recycle bin, we can find the recently deleted files and restore them to their original locations.

2. Use backup: If you have a backup habit, you can restore historical files through backup. Check your backup devices (such as external hard disk, cloud storage, etc.). ), find the previous backup version and restore the historical file to the computer.

3. Data recovery software: If the file is completely deleted or the hard disk fails, you can try to use data recovery software. These softwares can scan and recover the deleted files on your computer, but the success rate may vary according to the situation.

4. Seek professional help: If the above methods can't retrieve historical files, or involve the loss of important data, you can seek professional data recovery services. Professional data recovery companies can provide more advanced technical means to try to recover lost files.

It should be noted that the success of retrieving historical files depends on many factors, such as the deletion time of files and the use of hard disks. In addition, timely file backup and regular system maintenance are also important measures to avoid the loss of historical files.

I hope the above methods and expanded contents will help you!