According to users, they are receiving the This installation package could not be opened error message while trying to install certain applications. Luckily, there are ways to fix it on Windows 10.

How to solve this installation package could not be opened?

Solution 1 – Make sure that the application is unblocked

Depending on your security settings, Windows 10 can sometimes block certain applications from installing, causing the This installation package could not be opened error to appear. To fix this problem, you just need to find your setup file and unblock it. This is rather simple: After unblocking your setup file, try to run the application again. If you don’t have an Unblock option, it means that this file is already unblocked, so you’ll need to use a different solution.

Solution 2 – Temporarily disable your antivirus

Your antivirus is one of the most important applications on your PC, protecting you from unsafe and malicious files. It can also prevent certain files from running, however. If that happens, you can encounter the This installation package could not be opened error message. According to users, you might be able to fix this problem simply by disabling your antivirus software. After disabling your antivirus, try running the setup file again and check if the error message appears. Keep in mind that Windows 10 comes with built-in antivirus with its Windows Defender, so even if you disable your third-party antivirus your PC will remain safe. If disabling your antivirus fixes the problem, you might want to check its configuration and try to find the cause of the problem. On the other hand, if this error appears frequently, you might want to try updating your antivirus. In the worst-case scenario, you might need to switch to a different antivirus software altogether.

Solution 3 – Check if Windows Installer service is running

In order to install any application, Windows Installer needs to run. Sometimes, though, this service can become disabled which can cause the This installation package could not be opened error. To fix it, you need to manually start Windows Installer. This is relatively simple: The installation process is closely related to Windows Installer service, so if you’re having this problem, be sure to check if the aforementioned service is running.

Solution 4 – Modify your registry

According to users, you might be able to solve this issue simply by modifying your registry. Modifying the registry can be potentially dangerous and can lead to system instability, therefore we advise you to be cautious. To modify your registry, do the following: After making the changes, try to start the installation again. If any new problems occur after changing your registry, you can restore it at any time simply by running the backup file that you created in Step 3.

Solution 5 – Create a new user account

According to users, you can fix the This installation package could not be opened error simply by creating a new user account. Sometimes, your regular user account might not have the necessary privileges or it might be corrupted, causing this problem to occur. To fix the issue, you need to create a new user account and try to install the application from that account: After creating a new user account, log out of your current account and switch to the new one. Now, locate the setup file and try to run it. If you manage to install the application, you can go back to your main account and try to run it again. After doing that, feel free to delete the newly created account since you won’t need it anymore. A few users reported that this error occurs because they have a special character in their username. Certain setup files can’t handle special characters, so they will give you this error message. If that’s the case, you’ll have to create a new account that has only alphanumeric characters in its name and use it to install the problematic application.

Solution 6 – Enable a hidden administrator account

If creating a new user account doesn’t fix the This installation package could not be opened error, you might need to enable the hidden administrator account. This is rather simple: This will enable the hidden administrator account. Now, log out of your current account and switch to the new administrator account. After doing that, locate the setup file and try to install the application again. SPONSORED If you manage to install the application, go back to your main account. After switching back to your main account check if the application is working properly. If so, start Command Prompt as administrator and run the net user administrator/active:no command to disable the administrator account.

Solution 7 – Move the setup file to the root directory

Sometimes, in order to fix the This installation package could not be opened error, you need to move your installation file to the root directory on your PC. To do that, you just have to locate the setup file and move it to C: or any other root directory. After doing that, simply start the installation and it should work without any issues. Keep in mind that you can move the setup file to any root directory on your hard drive.

Solution 8 – Create a .bat file

According to users, you can fix this problem by creating a .bat file and using it to run the installation. To do that, follow these steps: If this method works, you’ll have to use it every time this message appears. Several users are also suggesting to make some adjustments to your registry in order to fix this problem. Before we start, we advise you to back up your registry just in case. We have to mention that this solution is potentially dangerous, so use it at your own risk. To make these changes, do the following: This is a bit of an advanced solution, so you need to be extra cautious while performing steps 3 to 8. As we already mentioned, it’s highly recommended you create a backup of your registry so you can easily restore it in case anything goes wrong.

Solution 9 – Try using a different browser

According to users, the This installation package could not be opened error can appear because your download is corrupted. To fix this problem, you need to download the setup file again with a different browser. Several users reported that this solution worked for them, so we highly recommend you try it out.

Solution 10 – Make sure that the setup file is located on a local drive

Users reported that the This installation package could not be opened error appears if your setup file is located on a network drive. If that’s the case, simply move the setup file from a network drive and try to install it again.

Solution 11 – Re-register Windows Installer

You might be able to fix the This installation package could not be opened error simply by re-registering Windows Installer. This is relatively simple: After doing that, try to install the application again and check if the problem is resolved.

Solution 12 – Change environment variables

You might be able to fix this problem simply by changing your environment variables. This is relatively simple, and you can do it by following these steps: After doing that, try to install the application again. If the problem persists, you might want to return environment variables to their default values.

Solution 13 – Completely remove iTunes and QuickTime

According to users, they are getting this error when trying to install iTunes. To fix the problem, you need to uninstall iTunes and QuickTime. To do that, follow these steps: A few users reported that in order to fix the problem, you need to delete all the files associated with iTunes and Quicktime, so be sure to do that as well. After, you should be able to install the application without any problems. The This installation package could not be opened error can prevent you from installing new applications and even though this error can be a nuisance, you should be able to solve it by using one of our solutions.

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