Installation guide for Windows MSB

Installation guide for Windows MSB

What is MSB ?

 Mettl Secure Browser is a web-based lockdown browser that converts any system into a safe workstation. 

It does not allow the candidate to move out of the test window before the test is finished. It also restricts from opening any unauthorized website or accessing any blacklisted software/third party applications. 

MSB also shuts down all active applications, such as other browsers and cheating tools.

Installing MSB

To begin MSB installation, the candidate needs to have MSB installation file downloaded on their computer. They can get this installation(.exe) file either through the test invitation email they may have received or via a direct download link. Click on the Mettl Secure Browser (MSB) downloaded file with the name MSB.exe. The candidate must follow the below steps:

1) Double click on the downloaded MSB file to launch installation.
2) Click on “Install”.





3) Once the installation is complete, click on “Close”.



4) Now click on the test link to launch the test.

Launching MSB 

After successful installation, candidate must click on test link shared with them which will automatically launch MSB. While launching the test, Mettl Secure Browser (MSB) will force-close all the browser windows and applications active on the system and ask for formal permission to do so. Upon launch, the below pop up informs candidate about the processes that need to be closed for MSB to launch.



To proceed, candidate needs to click on “OK” button and allow MSB to close these applications and browsers.

Also, if MSB is not able to close all the mentioned applications on its own, it may prompt the candidate to close those applications manually from the Task Manager.



Kindly open the Task Manager on the candidate’s system, select the mentioned options from the Apps and background processes prompted by MSB and close them by clicking on End Task.


Things to remember: 

To make sure that you do not face any trouble while attempting a test on MSB, please ensure the following:
There are no restrictions on the network.

Your Anti-Virus supports MSB.

You should have administrator rights on the system and not logged in as a Guest User.

Your OS is up to date with no pending installations.


Operating System: 

MSB will run on only windows (10 and above) and will support a minimum of 4.5.1. .NET framework (which comes inbuilt in the MSB.exe file)


Memory requirements:

MSB requires a 65 MB permanent free space on the default hard drive.

Attempting Test in MSB 

Once the candidate has installed and successfully launched a test in MSB, MSB will not allow them to move out of the application before the test is finished. All previously running browsers & applications are now forced closed by MSB and they will not be able to access them.

MSB does not have any navigation buttons, but the optional reload button in the taskbar or the key F5 can be used to reload the current page.


Avoid pressing F5 key as it also submits the test if pressed while attempting the questions.


MSB also does not allow sharing/mirroring of computer screens on any other display device


If the computer screen is shared before starting MSB, it will not allow the candidate to launch the test until they remove the cable used to share screens.

If the candidate attaches the cable to share screens while they are attempting the test, their test will be terminated.