items and i dont know how to disinfect them because it wont let me click on it. can anybody help me please

i just downloaded kaspersky internet security 7.0 and when i double click on it it doesnt open. I double click on it and it seems to load for like a second and then nothing happens. Can someone please help me…thank you

Right now I’m using the Avast antivirus.and advanced windows care personal for my system…r these the best else please suggest me a best free combo of antivirus and antispyware….
Thanks!!!

ps. i already have norton 360 virus protection that never seemed to pick it up?