Have only can install on a PC without any problems. On the second PC there was permanently error messages because of Angelich nonexistent version 4.5x of .Net and on the third PC totally chaotic blockages from me known and trusted sites (for example, my bank, Paypal, Amazon ...). The uninstallation if you then want to use a different scanner, only with the special Removal Tool Kaspersky halfway feasible. It is important that you have to call up all previous versions MANUAL to uninstall the tool.