Installing an application on Windows, like any other system process, can encounter issues such as “This installation is blocked by system policy.” As if that weren’t bad enough, it sometimes prevents many essential functions, such as Bluetooth and Wi-Fi connectivity , from working properly. While this could indicate a major problem with your computer, the solutions provided below will help you resolve the issue effectively.
1. Enable the Windows Installer service
If you accidentally disable Windows Installer, you'll encounter a number of installation problems. You may have difficulty removing programs from your computer if this feature is disabled. To launch the dialog box, "employment" , Follow the following steps:
- Click on Windows + R.
- Type services.msc And press Enter.
3. Scroll down to the option Windows Installer Double click on it.
4. In the new window, select “manual” From the drop-down menu "Startup type".
5. To enable the service, press the button. "Start" , Then click “Apply -> OK”.
2. Adjust local group policy settings
If you are using Windows Pro, Enterprise, or Education editions, you can also resolve the issue using Local Group Policy Editor (LGPE).
- click on the button Search Windows and enter “Modify approach The group and click best match.
- Go to “Computer Configuration -> Administrative Templates -> Windows Components.”
3. On the right side of the screen, click Windows Installer.
4. Click on the option that says Prevent non-administrators from applying vendor-signed updates.
5. Select the option “disabled” Or “not configured” In the upper left corner of the window that opens.
6. Apply the same configurations next to my options. Prevent user installations و Prevent uninstalling updates.
3. Run the program installation and uninstallation troubleshooter.
Microsoft offers troubleshooting programs that can help resolve this particular issue. Try running the program's installation and uninstallation troubleshooter, especially if you suspect that corrupted registry keys are at fault.
Note: Try this fix if you're using Windows 10, 8, or 7.
- of Microsoft website On the web, download Software installation and uninstallation troubleshooterDouble-click the file to run it.
- Click the button "the following" , then select the option "Install".
3. Select the disabled app and click the button. "the following".
4. If you cannot locate the application in the list, click the option Not listed Do a manual search for the program.
5. Wait for the troubleshooter to identify and fix the problem, then try the task that prompted the error message again.
4. Install apps in safe mode
There is another way to fix the error. “Installation is prohibited by system policy.” It is installing programs in safe mode.
- Right-click on the Start menu and select "Settings".
- After choosing “Update and Security” (Windows 10) or "the system" (Windows 11) Go to "Payback".
3. Go to option "Advanced startup" and click the . button "Restart now". will appear Recovery Environment Screen After restarting your computer.
4. Select "Startup Settings" within "Advanced Settings" on the next screen.
5. To start the computer in Safe Mode , click on the button "Reboot" The key F4 At the same time.
6. It is safe to assume that a faulty app or device driver is to blame if you no longer encounter the error in Safe Mode.
5. Isolate problematic programs
You can perform a clean boot if you believe some malfunctioning programs are the root of the problem. This method can narrow down the programs that are causing this error and other system problems.
- Click start menu , And type "Msconfig" , then choose "System Configuration" From the results list.
2. Switch to the tab Services at the top and select an option “Hide all Microsoft services” at the bottom.
3. Press the button Disable all , then press "application".
4. Select the tab "startup" And click Open Task Manager.
5. Again, click on the tab. "startup" , select each of the relevant items, and then press "Disable" Remember these elements to identify the problematic application.
6. Close Task Manager.
7. Choose "OK" In the System Configuration window, your computer will be in a clean boot environment when you restart it.
8. If you no longer experience the issue, the startup application you disabled is causing the problem.
6. Re-register the Windows Installer service
You can use Windows PowerShell by following the steps below to try to re-register the Windows Installer service and hopefully get rid of the issue your system is experiencing.
- Right-click on the Start menu and select “Windows Terminal (Admin)” Or “Windows PowerShell (Admin).”
- You can then temporarily unregister Windows Installer by entering the following command and pressing Enter.
msiexec /unreg
3. Enter the command below and press Enter To re-register Windows Installer.
msiexec / regserver
7. Change the DisableMSI value
DisablMSI can disable or restrict the use of Windows Installer. You can try changing its value to "0," which means Windows Installer is fully enabled and users can install and upgrade software.
- In the Start menu search box, enter “Registry Editor” and click Best Match.
- Go to this guide:
Computer\HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer
Then, in the right pane, double-click the value. “DisableMSI”.
3. Set Value statements on "0" and click "OK".
Advice: Windows Security won't open for you.? This is what you need to do.
8. Check local security settings.
Since the software restriction policy may be the source of the issue, changing its settings may resolve the current error. Note that Microsoft removed this option in the latest versions of Windows 11.
- First, tap start menu , And type "control Board" , and click on the top result.
2. Select "little symbols" From the drop-down menu option under View by.
3. Choose Administrative tools Or Windows Tools , Then select Local Security Policy.
4. Right click on Software Restriction Policies and select New software restriction policies from the menu that appears.
5. Choose "duty".
6. Select “All users except local administrators” , Then click “Apply -> OK”.
The error can be resolved. “This installation is not permitted by system policy.” This is a software-level issue, not a hardware-related one. It's a known bug, and Microsoft has developed a fix for this type of issue.
However, in the worst case, it may lead to Clean installation of Windows To solve the problem if none of the other alternatives work for you.
Frequently Asked Questions
Q1. What are some alternative ways to install and update software?
answer. Microsoft's Windows Package Manager is a useful alternative when it comes to installing and updating Windows applications. It's a command-line tool that allows you to simplify the management of your applications. If you're using Windows 11, this functionality is already available to you without needing to install anything else. To get started, Using Windows Package Manager Check out our detailed guide that walks you through installing, updating, and uninstalling apps.
Q2. What do I do if I can't uninstall the program?
answer. There are three main reasons why you might be unable to remove a program from your computer. First, it might be targeting an essential program that your computer needs to function properly. Second, the program might be running in the background, so you should end the process via Task Manager first. Finally, it might be experiencing problems that can be resolved by running Microsoft's Program Install and Uninstall Troubleshooter (Method 3).
Q3. Should I use third-party uninstallers?
answer. We do not recommend it. Although these uninstallers claim to undo any registry changes made by the application in addition to removing it, your computer's uninstaller software does the same thing. You should also remember that using untrusted applications can cause additional problems for your computer and operating system.
