How to Fix LastPass Error Code 1603 on Windows 10

If you are seeing LastPass error code 1603 on your Windows system that means the application was not installed properly. This can be fixed by closing the unnecessary applications or reinstalling the software. It is common to become overwhelmed with multiple usernames and passwords spread across different accounts on the internet.

You might have resorted to using “Forgot my Password” innumerable times to retrieve your credentials. LastPass offers a secured and freemium solution to managing all of it in one place, called Vault. You can save account passwords to it permanently.

You may see an error message on your Windows system that says “Installation failed, error code 1603“. This error usually appears when there is already corrupt/outdated LastPass software is installed on your system.

installation failed lastpass error code 1603

But this error can be fixed without much hassel. I have explained below how to get rid of error code 1603 below.

LastPass also assists in creating new passwords, storing PIN codes and IDs, and autofill addresses and credit card forms. Overall, it improves your productivity and offers secure storage options for encrypted data. Users can download and install it as a web extension or plugin available on leading web browsers like Chrome, Firefox, Edge, and Safari.

LastPass is available on smartphones for mobile applications as well.

How to use LastPass on Desktop?

There are two ways to get the LastPass password manager.

  1. Install the LastPass browser extension or plugin from your preferred web browser’s web store.
  2. Install the desktop application.

You need to create your account with a master password. It is entirely free of cost. Then you will unlock the password manager vault, where you can see, add, and manage items and sites.

LastPass allows users to fill their vaults in different ways. It can save in real-time as you log in to each site, import sites using your email data, or import and upload from other password managers.

For mobile app users:

You can download the LastPass app from your app store and manage passwords on the move. Moreover, if your phone has a fingerprint sensor, you can access your LastPass account with biometrics.

How to fix LastPass error code 1603?

Users often face error 1603 while installing LastPass on their Windows PC. Here are two methods to resolve the issue:

Remove older versions of LastPass & install fresh

An outdated LastPass version on your PC/Laptop may disrupt the installer, as the device fails to remove it. It will return error 1603, and you will have to uninstall the previous one manually –

  1. Press the Windows+R button, type Control, and hit the Enter button
    run command control
  2. Program > Uninstall a program
    Uninstall a program
  3. Find LastPass from the list.
  4. Right-click on it and choose the “Uninstall” option.
  5. Follow the wizards to finish it.
  6. Reboot your system.

Now you can attempt to download the latest version from the official website and install the latest LastPass version.

Close background apps

If you open Task Manager, you will notice several third-party programs running in the background, such as firewall or antivirus. These applications can interfere with LastPass installation. For instance, your real-time virus protection and firewall can block LastPass as “suspicious.”

Here is how you can disable them –

  1. Hold down Ctrl + Shift + Esc from your keyboard to open Task Manager.
  2. Under the Processes tab, right-click on non-essential files and choose End task.
    End task in Task Manager
  3. Close Task Manager
  4. Now, try to run the installation process.

This will fix the issue.

Check software like LastPass here.

Disable Firewall for a while

Sometimes due to Windows 10 security settings, the system not allow 3rd party software to install it. Thus, disabling the firewall for a while may help to install the Lastpass software:

  1. Click on the Windows logo
  2. Type Windows Defender Firewall, and click on it
  3. Now click on Turn Windows Defender Firewall on or off from the left menu
  4. A new window will open, here choose both the radio button that says “Turn off Windows Defender Firewall” and click on OK, as shown below:
    trun off windows defender firewall on Windows 10
  5. Now, restart the system and install the software.

Once the software will be installed successfully then revert the above settings.

Here is the best password manager software for Windows.

How to Fix for Browser?

If you are facing error 1603 while installing the web browser extension, here are the steps to resolve it –

  1. Open your chrome browser and then the browser menu.
  2. Click on the “Extensions” option.
  3. If you find LastPass already present, remove it.
  4. Now you can install a fresh copy of LastPass

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Founder and Writer @ WinOSBite. Future plan is to make this platform open to community to resolve and discuss various issues, usage related to Operating System.

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