AntiVirus and AntiSpyware Soft

Please read the project description fully before bidding. I prefer someone with experience on making AntiVirues and Spyware softwares. I need a nice looking and professional AntiVirus and AntiSpyware software for windows computers for me to sell. 1. I need to be able to generate unlimited license keys for any period of time in days as follow: 30 Days, 60 Days, 90 Days, 180 Days and 364 Days. 2. The software should have a place for the user to enter the key number to activate the software. The software should detect if the same key has been entered twice and not to extend the period of time the buyer paid for. This is to protect against cheaters trying to use the same key over and over again in order not to pay. 3. The buyer will just need to enter the license key on the software for it to start working fully. After the license key expires, the software needs to give a message stating that the license key has expired and that the person needs to buy another license key and have a link to go to my site. For more details on the software features I need, please see the attached file.