Bing Search History Not mine
If you see search history in Bing that you did not create, there are a few possible explanations for this.
If you think that a Bing search history that is not yours is being displayed, these are the main reasons for this problem:
You are not accessing your Bing history
Make sure you are logged into your Microsoft Bing account and not someone else’s.
Also, there are those who write bing search history in the search engine and believe that their searches will appear. That does not work like that.
You must access your bing history through this link: https://www.bing.com/profile/history
Someone is accessing your account
It is possible that either you or someone else may be using your Bing account. If you share your device with others, it is possible that someone else has been using Bing to search the web.
Make sure that you are not accessing from another device. For example a mobile phone or a tablet.
If not, it is recommended to change the password.
Malware or Virus
Your device may be infected with malware. If your device has been infected with malware, it is possible that the malware is using Bing to search the web without your knowledge.
This option is less likely but worth making sure. It is possible that you experience strange behavior on your device due to the presence of a virus or malware.
Make sure you run an antivirus to remove any suspect file.
You may be signed in to Bing on multiple devices
If you have signed in to Bing on multiple devices, the search history from all of those devices will be combined and displayed in your Bing account.
To resolve this issue, you should first try to determine if someone else has been using your device or if it has been infected with malware.
If neither of these is the case, you may want to check to see if you are signed in to Bing on multiple devices. Then you should sign out of any devices that you do not recognize.