What is FCIV?

By | May 23, 2016

FCIV stands for File Checksum Integrity Verifier. It is a tool that verifies the integrity and checksum of the files. When we download a file, especially those ones which are large sized, during the whole downloading process some errors occur due to network problems and the whole file is not downloaded completely and it lacks some parts. Even a bit of data not downloaded in softwares like an bootable ISO image file, updates and services packs of earlier installed softwares or a new software, makes the downloaded program void to run. Therefore, what is the solution for this specific problem? The solution is FCIV. The tool checks for the integrity and checksum errors.


Checksum value sometimes also referred as hash value is calculated by cryptographic hash function which is generally either MD5 or SHA 1. FCIV generates the checksum value of a file and matches it with the original checksum value provided by the software developers. Matching of both checksum values proves that the file downloaded is original in nature and has not been altered online by some hackers.

How to run FCIV?

1. Download it from http://www.microsoft.com/en-us/download/details.aspx?id=11533. It is very small in size less than 1 MB.
2. Create a new folder in windows explorer named FCIV.
3. Save the file in folder FCIV.
4. Open the folder and double click on file named Windows-KB841290-x86-ENU.exe.
5. Click on I accept the license agreement.
6. In the specified location field, browse the FCIV folder.
7. Extract files.
8. Now run command prompt.
9. Type fciv.exe in cmd window.
10. Add file path to generate checksum value.
11. In a few second FCIV will generate the checksum value.
12. Match it from the original website to ensure integrity.

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