Scan your computer for viruses with Kaspersky Virus Removal Tool.

1. Download Kaspersky Virus Removal Tool.
2. Run a scan using the guide in this this article.

If you are using Windows 10:

1. Click on the Windows search icon.
2. Type “create a restore point” in the search field and click Create a restore point.

3. Open the System Protection tab, select the disk for which you want to create the restore point.
4. Click Configure.

5. Select Turn on system protection and click OK.

6. Click Create.

7. Enter the description for the restore point and click Create.

8. Click Close.

A restore point for the local disk C in Windows 10 will be created.

If you use one of the earlier operating system versions, click the link to view the guide on the Microsoft support website:

• Windows 8.1
• Windows 7, Windows Vista or Windows XP

After you create a restore point, make sure you have a 20-digit activation code for your Kaspersky Lab product. You will need to enter it after you reinstall the application.

The code contains Latin letters and numerals divided into four groups of 5 characters.

If you bought the product offline, you will see the activation code in the Quick Start Guide you find in the box.

If you bought the product online, the activation code will be in the email message from the online store.

If you lost the activation code, you can restore it. For instructions, see this this article.

1. Download kavremvr.exe.
2. Run the file.
3. Review the license agreement. Click I accept the terms if you agree to its terms.

4. Enter the code from the picture.
5. Choose the Kaspersky application you want to remove.
6. Click Delete.

7. Wait until the application is removed and click OK.

8. Reboot the computer.

This will remove a Kaspersky application from your computer completely. If you have several Kaspersky applications installed, remove them one at a time.

Try installing the Kaspersky application once again. 

If the issue persists, send a request to Kaspersky technical support with a detailed description of the issue: 

• Through My Kaspersky, if you are using Kaspersky Internet Security, Kaspersky Anti-Virus, Kaspersky Total Security, or Kaspersky Security Cloud. See the Online Help page for instructions.
• Through Kaspersky Small Office Security Management Console, if you are using Kaspersky Small Office Security. See the Online Help page for instructions.