After you remove of G-Data antivirus software and restart your computer, some records may remain in the system registry and block installation of a Kaspersky Lab product. Please make sure that you fully uninstall G-Data software before installation of Kaspersky Lab software.
When you uninstall the third-party product from the computer using Microsoft Windows tools, the Program Files folder may contain remains of previous antivirus product versions. If the folder contains folders or files of antivirus applications, delete them and then
try to install your Kaspersky Lab product once again.
If removal of G-Data antivirus was not successful and the Setup Wizard asks to remove incompatible software manually, use a special tool to remove G-Data products:
If you are sure you fully removed the G-Data software, but installation of a Kaspersky Lab product still fails, then create a request to Kaspersky Lab Technical Support via the My Kaspersky portal. Attach a report of the Getsysteminfo tool to your request, give detailed description of the problem and explain the steps to reproduce the problem.
See how to use My Kaspersky on the Online Help page.
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