Installation instructions for Kaspersky Anti-Virus 21
Latest update: September 12, 2023
ID: 15407
Before installation:
- Check if your computer meets system requirements. See Online Help for more information.
- Check whether any applications installed on your computer are incompatible with Kaspersky Anti-Virus. We recommend removing all incompatible software to ensure that Kaspersky Anti-Virus works correctly.
- Close all running applications.
How to install Kaspersky Anti-Virus from the installation file
- Download the Kaspersky Anti-Virus installer from the Kaspersky website, or via the link in the email you received from the online store.
- Run the downloaded installer.
- Wait until the wizard finds the latest version of the application or click Skip to install the current version.
- Click the link to review the License Agreement. If you agree to its terms, click Continue.
- Click the link to review the KSN Statement. If you want to participate in Kaspersky Security Network, leave the corresponding checkbox selected.
- Click Install.
- Wait for the installation to complete. Make sure settings you want to apply are selected and click Apply.
- Click Done.
Kaspersky Kaspersky Anti-Virus will be installed on your computer.
After the installation, activate Kaspersky Anti-Virus. See Online Help for instructions.
If you want to skip activation at this point, use the Online Help guide.
If you want to skip activation at this point, use the Online Help guide.
How to install Kaspersky Anti-Virus through the command line
- Download the installer from the Kaspersky website or via the link in the email you received from the online store.
- Open the command line as an administrator. See this article for instructions.
- Enter the path to the installation file and the command for starting the installation with required parameters. Command line installation parameters and properties are described below.
- Follow the instructions of the installation wizard.
Main parameters
| Command name | Value | Example |
|---|---|---|
| /s | Silent installation mode. Dialog boxes are not displayed during installation. | kav21.exe /s |
| /mybirthdate=YYYY‑MM‑DD |
Date of birth. If you are under 16, installation will not be allowed. This parameter is:
|
kav21.exe /mybirthdate=1986‑12‑23 |
| /l | Defines the language used while the multi-language version is being installed | kav21.exe /len-us |
| /t | The folder where the installation log will be saved. | kav21.exe /tC:\KasperskyLab |
| /p<option>=<value> | Used to specify an installation property | kav21.exe /pALLOWREBOOT=1 /pSKIPPRODUCTCHECK=1 |
| /h | Opens the help dialog box | kav21.exe /h |
Additional settings
| Command name | Value | Example |
|---|---|---|
| /x | Application removal | kav21.exe /x |
Commonly used installation properties
| Command name | Value | Example |
|---|---|---|
| ACTIVATIONCODE=<value> | Enter the previous activation code. | |
| AGREETOEULA=1 | Confirm your consent to the End User License Agreement | |
| AGREETOPRIVACYPOLICY=1 | Confirm your consent to the Privacy Policy. | |
| JOINKSN_ENHANCE_PROTECTION=1 | Confirm your consent to data provision for product improvement purposes. | |
| JOINKSN_MARKETING=1 | Confirm your consent to data provision for marketing purposes. | |
| INSTALLDIR=<value> | Used to specify the installation folder This parameter can only be used for Kaspersky Anti-Virus. | kav21.exe /p"INSTALLDIR=C:\Documents and Settings\kav21" |
| KLPASSWD=<value> | used to protect certain functions of the product with a password. If the value of the KLPASSWDAREA parameter is not set, the default password scope is used:
|
kav21.exe /pKLPASSWD=12345678 |
| KLPASSWDAREA=[SET|EXIT|UNINST] | defines the scope of the password specified by the KLPASSWD parameter:
The option may have multiple values; in such case, the values are separated with a semicolon. |
|
| SELFPROTECTION=1 | Enables the product's Self-Defense during the installation. | kav21.exe /pSELFPROTECTION=1 |
| ALLOWREBOOT=1 | Allow restarting the system if it is necessary. | kav21.exe /pALLOWREBOOT=1 |
| SKIPPRODUCTCHECK=1 | Do not search for applications incompatible with Kaspersky Anti-Virus.
|
kav21.exe /pSKIPPRODUCTCHECK=1 |
| -oembackupmode | Do not run the application after installation if Windows is booted in the Audit Mode. | kav21.exe /s -oembackupmode |
By using the SKIPPRODUCTCHECK=1 parameter, you assume responsibility for the possible consequences of the Kaspersky Anti-Virus incompatibility with other applications.
The SKIPPRODUCTCHECK=1 parameter only allows you to ignore those applications that should be removed manually.
Example of the compound command that allows a computer restart and skips the incompatible software check:
kav21.exe /pALLOWREBOOT=1 /pSKIPPRODUCTCHECK=1
How to use the application on multiple devices
If you intend to use the application on several computers:
- Install Kaspersky Anti-Virus on each computer.
- Activate Kaspersky Anti-Virus on all the computers with the same activation code. See Online Help for more information.
If you want to skip activation at this point, use the Online Help guide.
Post-installation recommendations
- Update the databases of Kaspersky Anti-Virus. See the Online Help page for instructions.
- Check the protection status in the application main window. See Online Help for more information.
- Run a full scan of the computer. See the Online Help page for instructions.
What to do in case of installation errors
If you encounter any problems when installing Kaspersky Anti-Virus, see instructions in the Installation errors section.
If the error persists, contact Kaspersky Customer Service by choosing the topic and filling out the form.