The first and most critical point to understand is that on its main website. The link provided on the official website, https://www.kaspersky.com/downloads/thank-you/total-security#download , directs you to a small online installer (typically around 4-5 MB). This is a stub that, when run, must connect to Kaspersky's servers to download the actual installation files, which can be over 2.5 GB.
If you need to install Kaspersky on a PC without an internet connection, you can "capture" the installation files using an online PC: Download the standard Kaspersky Total Security web installer kaspersky total security offline installer link
Copy the original web installer into that same folder on your USB drive. You can now run the installation offline from that folder. Kaspersky Support Forum 3. Third-Party Mirror Links The first and most critical point to understand
Uninstall any previous or expired third-party antivirus programs to prevent system crashes and software conflicts. If you need to install Kaspersky on a
: The existing Total Security application still provides security with your activation code but will no longer receive new feature updates.