|You can download the trial version of Norton 360 from here and once installed you can activate it as a full version using your key.|
Ignore the scaremongers about Norton being bloatware, these days it is extremely good and those who say it isn't have invariably never tried using recent versions. I install many different security programs on different machines, and Norton is now the fastest to install, usually less than a minute, and as it's a complete package, unlike Microsoft Security Essentials, you are totally safe doing on-line banking etc. - more than can be said if you are using MSE. I agree about McAfee though, they still haven't got their problems sorted..
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd