What is a .BK1 File And How To Open It – Microsoft

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Have you came across a file with the .bk1 extension, but it is a file you have never seen before? It is important to know how to open this file – in order to be able to work with it. Thanks to this easy guide you will be able to find out what .bk1 file extension is, how to open it and how to work with it.

What is a .BK1 file?

The .BK1 file extension is from Windows Indexing Service File. The developer of this file extension is Microsoft. The format of this system related files is binary.

What to know

There is currently 1 software that can open the .bk1 file on 1 platform.

How to open a .BK1 file?

In this part of the article we will show you how to open the .BK1 file on various operating systems.

How to open a .BK1 file on Windows (7, 8, 10)

We have written below an easy-to-understand guide on how to open the .bk1 file on Windows in 4 easy steps.

1. The first step is to download the Microsoft Windows software. This software will be used for opening the file.

Step 2

Step 2: Locating your .BK1 file

2. The second step is locating the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 3

Step 3: Choose “Open with”

3. In the third step right click on your file and choose “Open with”.

Step 4

Step 4: Choose the software and click ok

4. After choosing the “Open with” option, you will have an option to choose the Microsoft Windows software you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .BK1 file?

If you are still unable to open the .BK1 file, it might be because you are trying to open the wrong one. The .BK1 file extension is similar to other file extensions such as: .bk1 – Autodesk, .bk1 – CA. You might be trying to open the wrong file, please recheck if you are trying to open the right file extension again.


In this article you have learned how to open the .BK1 file with the Microsoft Windows program on Windows.