Fatal Error in Kaspersky Antivirus in Windows 10

Kaspersky is antivirus software that is used to defend and secure your computer from malicious programs as well as online threats. Thus, it ensures safe internet browsing and it also provides data security. Therefore, you must install the Kaspersky antivirus software on your computer. But today most people report that they are facing fatal error in Kaspersky antivirus software while installing.

In this article, you will be guided on how you can fix fatal errors in Kaspersky. Read this complete article and resolve the issue that you are facing in Kaspersky!

What are the main causes of Fatal Error in Kaspersky Antivirus?

Various reasons are responsible for the Kaspersky error while installing. Some of the causes have been listed here:

1: Disruption of internet connection while downloading Kaspersky. When the internet connection is disrupted then the Kaspersky antivirus software may not get downloaded correctly.

2: If the device drivers on your computer are not up to date then it might not allow the Kaspersky antivirus software installation so the error gets cause.

3: Sometimes the registry entries on your computer can also be the reason for causing this error. Registry errors that get corrupted can be the major cause for the error in Kaspersky installation.

How to Fix Fatal Error in Kaspersky Antivirus?

During the installation of Kaspersky, the major thing that interrupts is the “Fatal Setup error”. This mainly occurs due to the failed registration of windows registries, improper backups, misplaced configuration data, or installing the Kaspersky Antivirus.

Follow the given steps to fix fatal error in Kaspersky:

Solution 1 – Uninstall Other Antivirus to fix fatal error in Kaspersky :

Follow the given steps to uninstall other Antivirus:

1: Go to the Start menu and then select the Control Panel.

control panel

2: Now, choose to Uninstall a program in the Programs category.

uninstalla program in control panel to fix Fatal Error in Kaspersky

3: Next, you need to select the antivirus program that you want to remove and then select Uninstall.


4: When prompted, you need to Restart your computer.

restart your device

Solution 2 – Run SFC Command in PowerShell to fix fatal error in Kaspersky :

In order to run the SFC command in Powershell, try to use these given steps:

1: Firstly, click the Start button in the search bar and then type cmd.

2: Now, right-click on cmd.exe and then select Run as Administrator.

cmd run as administrator

3: Next, you need to click on yes on the User Account Control (UAC) prompt that appears.

4: Once the blinking cursor appears then you need to type SFC/scannow and then press Enter key.

Enter command sfcscannow to fix Fatal Error in Kaspersky

Solution 3 – Reset Host Files to Default Settings:

Refer to these steps to reset host files to default settings:

1: Firstly, you need to open the Notepad.

2: Now, in order to do this search for “Notepad” you need to use Cortana and then click on the Notepad icon.

3: Next, you need to copy the following text and then paste this same text into the file.

  # Copyright (c) 1993-2006 Microsoft Corp. # # This is a sample HOSTS file used by Microsoft TCP/IP for Windows. # # This file contains the mappings of IP addresses to host names. Each # entry should be kept on an individual line. The IP address should # be placed in the first column followed by the corresponding host name. # The IP address and the host name should be separated by at least one # space. # # Additionally, comments (such as these) may be inserted on individual # lines or following the machine name denoted by a ‘#’ symbol. # # For example: # # rhino.acme.com # source server # x.acme.com # x client host # localhost name resolution is handle within DNS itself. # localhost # ::1 localhost

4: Now, on the File menu you need to select Save as and then type “Hosts” in the File name box and then save the file into the desktop.

5: Now, you need to close Notepad.

6: In the next step you need to search for %WinDir%\System32\Drivers\Etc by using Cortana and then you can select the file folder icon.


7: Now, hold or right-click the Hosts file and then select Rename and rename the file as “Hosts. old”.

8: The next thing that you need to do is to copy or move the Hosts file that you created in the above step from the desktop to the %WinDir%\System32\Drivers\Etc folder.


9: Here if you are prompted to enter an administrator password then you need to select Continue.

Solution 4 – Check Leftover Registry Key:

Here is how you can check leftover Registry key:

1: First, you need to press Win+R keys on your keyboard to open the Run dialog box.

2: Now, you need to type “Regedit” and then hit enter.

regedit to fix Fatal Error in Kaspersky

3: Next, you need to navigate to the following given link inside the Registry editor window:


4: Now, you need to expand the folder called Run and then search for a Registry key called as avp**_post_uninstall


5: Here you need to right-click the above-mentioned key and then select Delete.

6: Now, you can check if the issue persists or not and if not then continue with the next step.

Solution 5 – Check junction Point pointing Location:

To check the pointing location, do these following steps:

1: Firstly, open the application window.

2: Now, in the location drop-down list you need to select the country to connect from.

3: Next, if you want the applications to select the optimal country to connect from then you need to select the automatic option.

Solution 6 – Remove all Traces of Previous Security Package:

The most common cause for not installing the Kaspersky is that it has been found traces from other security packages and thus it stops the installation from not going further. However, the Kaspersky products have been much better at detecting these issues but this can still cause the install process to get fail.

It is quite easy to make use of a removal tool and clear up any leftovers from a previous antivirus package. Therefore, you need to download and then run the previous tool for each brand that you have installed on your computer and this also involves the previous versions of Kaspersky products.

Solution 7 – Resolve Machine Specific Issue:

In order to resolve machine-specific issues, try these methods:

1: Firstly, run through a virus scan and it is obvious that doing a virus scan is more effective.

2: Now, update your software.

update settings

3: Next, you need to cut down the bloat.

4: Test your Wi-Fi connection.

5: Re-install the operating system.

Solution 8 – Resolve application Specific Error:

To resolve application-specific error, you need to perform the following steps:

1: Firstly, you need to download the installer from the Kaspersky website.

download and install the software to fix Fatal Error in Kaspersky

2: Now, remove the application.


3: You can also remove the Kaspersky application by using the kavremover tool.

4: Now, restart your PC.


5: Next, run the installer.

6: Activate the application.

Solution 9 – Use other Software:

To make use of other software use these given steps:

1: You need to buy a third-party code for Antivirus from the Kaspersky website.

2: Now, you need to enter the activation code into your Total security application.

3: Next, download the installer from the Kaspersky website.

download and install the software to fix Fatal Error in Kaspersky

4: Now, run the installation and then follow the installation steps.

5: Finally, you can restart the computer.


Solution 10 – Remove Files of Earlier Installation:

To remove the files of earlier installation, perform these given steps:

1: First, right-click the Start button.

2: Now, click Search.

3: Next, type Disk cleanup.

4: Again, right-click Disk cleanup.

5: Now, click Run as Administrator.

Disk cleanup to fix Fatal Error in Kaspersky

6: Click the drop-down arrows below drives.

7: Now, click the drive that holds your windows installation.

8: Next, click Ok.

select local disk to fix Fatal Error in Kaspersky

Frequently Asked Questions (FAQ’s)

Q1: How you can fix installation errors?

Ans: Following has been listed some steps to fix installation errors:

1: Click start.

2: Now, on the general tab, you need to click Selective startup and then clear the Load startup items check box.

3: Next, click Services, then you need to click Hide all Microsoft services and then click Disable all.

4: Click ok and then click Restart.

5: Now, try running your software program installation.

Q2: How you can fix the setup initialization error?

Ans: Here are some of the steps to fix initialization error:

1: First, sign in to your computer as an Administrator.

2: Now, empty your Temp folder, and to open the Temp folder you need to enter % TEMP% in the address bar of File Explorer.

3: Next, you need to disable your antivirus software.

4: Disable user account control.

5: Now, run the installer.

Q3: How you can find a way for getting Kaspersky password?

Ans: Below has been listed some ways to find this method:

1: First, boot to a safe mode.

2: Now, you need to open the Registry editor.

3: Next, double-click on Enable Password protect and then change the value to 0.

4: Here you need to delete the value.

5: Restart the computer.

Q4: How you can clear cache Google chrome?

Ans: To clear cache in Google Chrome learn these steps:

1: Open the Chrome app.

2: At the top right, tap more.

3: Now, tap History.

4: Clear Browsing data.

5: At the top, choose a time range, and to delete everything you need to select “All time”.

6: Next, to cookies and site data, you need to check the boxes.

7: Tap clear data.

Q5: How you can clear the cache on the PC?

Ans: In order to clear cache in PC look for these steps:

1: Firstly, go to Settings and then choose Apps or Application Manager.

2: Now, swipe to the All Tab.

3: Next, in the list of installed apps you need to find and tap your web browser.

4: Tap clear data and then Clear Cache.

5: Exit and then quit browser windows and then re-open the browser.

Final words

So, in this article, we have learned the troubleshooting steps for fixing “Fatal error in Kaspersky antivirus”. You can follow these steps and see which one works best for resolving this issue.

However, if this won’t help then you can contact our experienced technicians and get help from them. You can also communicate with us via chat and ask your queries. We assure you that we fix your problem as soon as possible. So, get in touch with us today and resolve all printer-related problems with our hassle-free solutions.

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