All about BS_ Files

The BS_ file type is primarily associated with Bookshelf.

BS_	File extension: BS_
	File type:	Find Menu Shell Extension

What is a BS_ file

BS_ files mostly belong to Bookshelf by Microsoft Corporation. Use our "Online BS_ Text Viewer" below to analyze your BS_ file and to see all text it contains.

How to open a BS_ file

You need a suitable software like Bookshelf to open a BS_ file. You need a suitable software like Bookshelf from Microsoft Corporation to open a BS_ file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your BS_ file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a BS_ file directly in the browser:. Just drag the file onto this browser window and drop it.

Online BS_ Text Viewer

Choose your .bs_ file to analyze

or drag and drop it here

Online File Viewer

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.BS_ File Won't Open? Here is What You Can Do

Because .BS_ files can originate from various programs, they aren't universally openable.

Identify the Source: Files from older Windows reference libraries usually belong to Microsoft Bookshelf as a Find Menu Shell Extension. Alternatively, the underscore often indicates a compressed installation file.
Check the Header: Open the file in a hex viewer to inspect the first bytes:
- SZDD or KWAJ: Indicates a legacy Microsoft compressed file.
- MZ: Suggests a compressed executable or DLL.
Use the Original Software: The original program is usually required; try Microsoft Bookshelf, the Windows expand utility, or ask the sender if uncertain.
Use this Webpage: Drag and drop your file here to detect its format, extract readable metadata, and preview the contents.

Technical Data for BS_ File Extension

Related files:

bs, vbk, vsix, vbx

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: BSStub, FileType: Bookshelf 98 Find Menu Shell Extension

a bs_ Find Menu Shell Extension is a special file format by Microsoft Corporation and should only be edited and saved with the appropriate software.

How to solve problems with BS_ files

Associate the BS_ file extension with the correct application.
Update your software that should actually open find menu shell extensions. Because only the current version supports the latest BS_ file format. Search, therefore, e.g. on the Microsoft Corporation manufacturer website after an available Bookshelf update.
To make sure that your BS_ file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .BS_ file online - secure, fast, and no downloads needed.