Hi ThuF, When you first started using your PC, McAfee should have prompted you to create an online account to register your subscription. If you have done this, you can log into your McAfee account with the details you used, and from there you will be able to download your McAfee software.  [URL]  If needed also refer How to recover your McAfee My Account password. Another option would be to install a FREE security setup. There are some excellent free security tools available.. Please post back if you would like us to offer advice and help you in choosing free software to meet your needs.
When I bought my XPS this summer I got a 15 months licence for McAfee. Now that I re-installed my computer I of course don't have the mcAfee security anymore. Where can I download it again, so I have the right one that fits my licence and how can I activate it again?  Thanks 
McAfee Account Recovery