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Antivirus installation error

This error can happen during the installation of the antivirus. Sometimes, the virus or malware on your computer could be blocking the installation. To solve this issue, you need to create a rescue disk on another PC and make use of it to remove or delete the malware. Sometimes, Antivirus installation error occurs due to corrupted files or a certain third-party application installed on your system.

Antivirus software not installing

The following steps can help you to resolve this antivirus installation error.

  • First, check whether you have installed any other antivirus on your computer.
  • Check if the antivirus is compatible with the operating system of your computer.
  • Try to perform a clean boot. Press the Windows + R keys together to open the Run dialog box.
  • In the Run command, type msconfig and then hit Enter.
  • The System Configuration window opens. Go to the Services window and then select the Hide all Microsoft services option.
  • Next, click the Disable all button.
  • Go to the Startup tab and then click the Open Task Manager option.
  • A list of application startups will be displayed.
  • Now, right-click the top item of the list and then select the Disable option.
  • Exit the Task Manager window and then return to the System Configuration window.
  • Click the Apply button and then click the OK button to save the modifications.
  • Once done with the process, restart the PC and then check whether the problem is solved.
  • Make sure to clean the PC with CC cleaner. Delete all the infected or the problematic applications that have been installed on your computer.

Managed antivirus installation failed

  • First, turn off the Managed Antivirus feature for the device.
  • For that, you need to right-click the name of the device within the dashboard.
  • Choose Edit Device. Next, choose Managed Antivirus and then turn off Settings. You can see the Managed antivirus-not installed alert on the Confirmation Summary tab.
  • Now, go to the C: Program Files ( X86 for 64 bit)\Advanced Monitoring Agent (GP if installed via GPO)\ featuresres directory.
  • Erase the feature MSI files that have not been installed.
  • Make sure to delete the folders below.
  • C:Program Files (x86 for 64bit)\Advanced Monitoring Agent(GP if installed via GPO)managed
  • C:\ProgramDta\Managed Antivirus
  • Make sure the firewall installed on your computer allows *.systemmonitor.us.
  • Launch the Notepad application as an Administrator. Next, right-click the Notepad and then click the Run as Administrator option.
  • Now, launch the settings .ini file that is located in C:\Program Files (x86 if 64 bit)\ Advanced Monitoring Agent(GP if installed via GPO)
  • Search for the sections below.
  • Modify the name INSTALL_ERROR_COUNT to 0 and then save the file.
  • Finally, restart the Advanced Monitoring service and then turn on the Managed Antivirus feature.

Virus not allowing to install antivirus

The guidelines below can help you to troubleshoot the antivirus installation error caused by the virus.

  • First, plug a USB device into the computer. 
  • Next, download the Windows Defender offline from the manufacturer’s site and then run it.
  • This Windows Defender offline tool will help you to install it on the USB drive.
  • Now, insert the Windows Defender Offline media that you created before into the capable infected computer.
  • After this, make sure to restart the PC. A pop-up will appear prompting you to run a scan.
  • Start the scanning process to find unwanted, malicious software that have been installed on the PC.
  • Finally, the Windows Defender will search for the malware on the infected PC, and remove the infected or corrupted files.
antivirus installation error

My computer is slow after installing antivirus

  • It is obvious that your computer gets slow down after installing an antivirus.
  • The main reason behind the slow performance of the computer is antivirus occupies lots of storage.
  • Before you install any antivirus on your computer, check for the available RAM.
  • Depending on the available storage, install the recommended/compatible antivirus on the computer.
  • But, in recent days, all the computers have high storage. So, the performance of the computer will not drop.
  • Try to remove the unwanted files on your local disk to free the space.
  • Change the scanning time of an antivirus running on the computer.
  • You are strongly recommended to change the scan intensity. This will reduce memory usage during scanning, which in turn improves the performance of the computer.
  • The scan intensity should be low.

Can't install antivirus progam on windows 7?

  • If a computer gets affected by viruses, the virus will provoke the antivirus installation error.
  • Download the Malwarebytes Anti-malware software on another computer and copy it in the USB drive.
  • Insert the USB drive that contains the Malwarebytes Anti-malware software into the infected computer.
  • Make sure the USB drive is not already infected by viruses to avoid spreading viruses to another computer.
  • Search for the Malwarebytes Anti-malware from the search bar.
  • When you see the prompt message window, select the Run button.
  • After running the Malwarebytes Anti-malware software, click the OK button.
  • When you see the next window, navigate to the Scanner tab, and select the radio button next to the Perform Full Scan option.
  • Click Scan to begin full system scanning.
  • Instead of using the Malwarebytes Anti-malware software, use the Windows Defender Offline software to resolve the issue.
  • Install and run the Windows Defender Offline software.
  • Once you are done with updating the virus definitions using the Windows Defender offline software, reboot the system.

Antivirus not installing in windows 10

There are many reasons that will prevent antivirus installation. Follow the below-mentioned solutions to fix this Antivirus installation error on Windows 10 computer.

Solution 1 - checking compatibility of the system to install an antivirus program

  • If the installing antivirus is not compatible with the Operating System, the antivirus might not install on your computer.
  • Visit the manufacturer site of the antivirus program and then check the compatibility of it to avoid the installation problem.
  • For example, any less famous antivirus does not support Windows 10.

Solution 2 - use rescue disk

  • Due to the presence of the virus on your Windows 10 computer, the antivirus program installation process gets affected.
  • In this case, you are recommended to create a rescue disk from a second computer and boot it on the infected computer to remove the malware.
  • Once you have removed the malware from the infected computer, it is easy to install any antivirus program on your Windows 10 computer.

Solution 3 - sfc scan and dism scan

  • The corrupted file also leads to the antivirus installation error.
  • To fix the corrupted files, run either the DISM or SFC scan. If needed, run both the DISM and SFC scan one after another.
  • Go through the steps provided below to know how to perform the SFC scan on the Windows 10 computer.
  • After pressing the Win and X keys at the same time, click the Command Prompt (Admin) option.
  • Type the command line ‘sfc/scannow’ without single quotes in the Command Prompt window and tap the Enter button to run the command.
  • Wait for 15 minutes to finish the SFC scanning process. Make sure not to interrupt during the scanning process.
  • To perform the DISM scan on the Windows 20 computer, enter the command line ‘DISM/Online/Cleanup-Image/RestoreHealth’ in the Command Prompt window.
  • The scanning time taken to perform the DISM scan is 20 minutes. Wait patiently until it gets over and then check whether the error is resolved by installing an antivirus on the Windows 10 computer.

Solution 4 - uninstalling third-party software

  • The presence of certain third-party software on the Windows 10 computer may lead to an antivirus installation error.
  • Also, keep in mind that two antivirus programs cannot function together normally.
  • So, you are recommended to uninstall or remove the already existing antivirus program from the computer before installing a new antivirus.
  • Use any recommended uninstaller to remove the third-party application from the Windows 10 computer.
  • The recommended uninstallers are IOBit Uninstaller, Revo Uninstaller, and Ashampoo Uninstaller.

Solution 5 - disabling windows defender

  • Click the Settings option to launch the Settings application on the Windows 10 computer.
  • Select Update and SecurityWindows DefenderOpen Windows Defender Security CenterVirus & Threat ProtectionVirus & Threat Protection Settings
  • Turn off the toggle button next to the Real-time Protection option to disable Windows Defender on your computer.

Solution 6 - performing clean boot

  • Launch the Run window and enter ‘msconfig’ to display the System Configuration window.
  • Navigate to the Services tab, checkmark the box beside the ‘Hide all Microsoft services option, and click the Disable button followed by the OK button.
  • Move to the Startup tab and then select the Open Task Manager link.
  • You will see the Startup Application list when the Task Manager window opens.
  • Right-click the startup application and then select the Disable option.
  • Repeat the previous step to disable all the startup applications.
  • After closing the Task Manager window, click the Apply button followed by the OK button in the System Configuration window.
  • Do not forget to restart the computer after performing the steps mentioned above.s

Solution 7 - disabling the fast startup feature

  • Press the Win and S keys simultaneously.
  • Type ‘power settings’ in the search bar and then select the Power & sleep settings option from the search result.
  • In the next window, select the Change settings that are currently unavailable link.
  • Click the Additional Power Settings link.
  • Click the ‘Choose What the power button does’ option and then click the ‘Change settings that are currently unavailable’ option.
  • Remove the checkmark next to the Turn on fast startup (recommended) option and then click Save Changes.

Should I uninstall antivirus before installing another?

  • In rare cases, the already installed antivirus program on the Windows computer will create a problem while installing a new antivirus program.
  • Uninstall the current antivirus program from the Programs and Features window.
  • Then, install the new antivirus program on your computer.

Can I install antivirus program in safe mode?

  • Yes, you can install and run the antivirus program on your computer in a safe mode.
  • On the Windows 7 computer, restart your computer and press the F8 key on the computer’s keyboard.
  • Click either the Safe Mode or Safe Mode with Networking option.
  • Use an installation CD to install the antivirus program you want.
  • Unable to fix the Antivirus installation error? Contact our technical support team by accessing the Call button available on this screen.