Yes - just about anything else
Ahem.
Right - composure.
If you want to pay, Kaspersky is probably the best. NOD 32 is worth looking at but I'm not sure if they do an all in one program.
For free, combine several programs for all round protection.
The three main AV contenders, for free, are: Antivir; Avast; AVG.
Adaware, Spybot, Windows Defender are some of the programs to take care of Adware, trojans and the like.
You needn't pay a penny and have some very strong defense against nasties.
Check out
This thread for links and ideas.