Cannot Install Antivirus On Windows 7

Kaspersky is one of the best antiviruses in the fight against malicious programs, but sometimes there are problems that prevent Kaspersky from installing on the Windows 7 or 8 operating system.

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The main reasons that make it impossible to install Kaspersky on Windows 7/8, and how to solve them

  1. One such reason is the presence of another antivirus program already installed. It should be understood that all full-fledged antiviruses, with the exception of some, conflict with each other. Therefore, do not try to install two antivirus programs on the same version of Windows. When uninstalling Kaspersky Lab using standard Windows 7/8 tools (Control Panel. Add / Remove Programs), problems may arise due to which the antivirus will be deleted or will be partially removed. To fully remove the Lab, use the kavremover utility. Download link from the official website: http://support.kaspersky.com/downloads/utils/kavremover.exe
  2. The second reason, related only to Windows 8.1, is the inability to install Kaspersky using the old version of the installer. In such cases, try downloading from the official site a new version of the installer with an already integrated patch for your version. The fact is that Windows 8.1. slightly different from previous versions of the operating system, and for proper installation of Kaspersky requires a patch.
  3. And perhaps the most common and dangerous reason leading to the inability to install an antivirus is system control with the SalityNAU virus, which modifies the host system file. It is quite difficult to deal with it, since it takes control of the entire system, blocking the installation of any anti-virus program, as well as blocking access to official sites. In some cases, it can block access to the task manager, command line and registry editor, prohibits access to social networks, such as Vkontakte, Odnoklassniki, etc., does not allow downloading files more than 2mb, infects exe files, which prevents them from starting.

Ways to deal with SalityNAU on Windows 7 (8)

  1. Go to the folder C: \ WINDOWS \ system32 \ drivers \ etc. Open the properties of the host file and uncheck the item "Read Only".
    Cannot Install Antivirus On Windows 7

    Then we open the file using notepad and delete all the lines, and then bring it to the following view (only for versions 7 and 8 of Windows):

    Cannot Install Antivirus On Windows 7
  2. If changing the host file did not help, I advise you to download the Dr.Web CureIt utility, which copes with the SalityNAU virus perfectly and does not conflict with other anti-virus programs. Download link: http://www.freedrweb.com/cureit/. The program is not installed on the operating system and is not registered in the registry, so the virus should not notice it. However, I cannot give an exact guarantee on this.
  3. If you cannot start Dr.Web CureIt on an infected version of Windows, try to launch it using the Live CD. Enter Bios (when booting the 7th or 8th Windows, press and hold F8) and change the boot order by placing boot from removable media first. Insert removable media from the Live CD and reboot the system. Using Dr.Web CureIt antivirus or AVZ scanner, try to remove the virus that blocks Kaspersky installation.
  4. If you have a registry editor running, it is recommended that you check 2 parameters. To open the editor, click Start. in the search bar drive Regedit. run Regedit.exe (for Windows7) or press Winkeyr. in the line we type the same phrase. Run (for Windows 8). In the editor, go to the path HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon. We are interested in 2 files: shell = explorer.exe; userinit = C: \ Windows \ system32 \ userinit.exe.

Cannot Install Antivirus On Windows 7

If, after all of the above, the problem persists, then you will have to reinstall the operating system, dropping important files to removable media.

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