I am currently using AVG but it has become a royal pain. Autoupdate usually takes over the machine or it appears that it froze. Others that I do not recommend: 1. Norton - Has never been good and became worst when it dissolved Central Point. 2. McAffee - Always asks if you want to continue working or restart after an update. 3. Karsperky - Too intrussive, even alerts you when MS Access runs a macro. 4. OneCare - As good as nothing. 5. Avira - Confussing interface, blocks internet access including e-mail by default (it appears to be this way). Only customer support available is by phone (toll call to Australia) and free forum after confirming your e-mail by a message that they will never sent you. Unable to contact moderators until accounts is validated via previous method. All moderators are german and have difficuty understanding the messages (no offense to anyone). Not to sound like a heel but you may be better off trying a cracked version of what you like and then purchase the product. I deffinitely will stay away from Avira Premium.