One of my friends who own a security forum is organizing a contest where you can win:

3 x SUPERAntiSpyware Profesional (*3 LIFETIME Licenses)
2 x BitDefender Internet Security 2010 (*1 License for 1 Year and 1 License for 6 Months)
1 x BitDefender AntiVirus 2010 (*1 License for 1 Year)
1 x Panda Internet Security 2010 (*1 License for 1 Year)
2 x Panda AntiVirus Pro 2010 (*2 Licenses for 1 Year)

Rules are here
SCF's 3rd Anniversary Contest!

To enter the contest its enough that you announce the contest on your blog or forum where are you active and then report your entry on the SC forum.