Don't bother with that free stuff...although free anti-virus apps can be good, they never have all the features a good pay for app has. If you want Kaspersky get it here for as little as £10.01:
http://www.ebuyer.com/UK/product/115024
or for only a few quid more get the Security suite which includes the anti-virus app:
http://www.ebuyer.com/UK/product/115020