I have Smart Security 4 on three computers in my home and just upgraded to 5 at the time of renewal. I am having difficulty installing 5 on a laptop, but not any problem with two desktop computers. I am getting an error message that says,"service eset (ekm) could not be stopped. Please verify that you have sufficient privileges to stop system service. The installation is getting right to the end and that error message pops up. The laptop is a Dell Inspiron with Windows 7 Home Premium and a 64 bit intel processor. Thanks in advance if you can help.