I've tried BitDefender antivirus products since 2009 and I must admit that this is one of the best commercial antivirus software out there. However, I've only tried the products on a desktop environment with a monitor (obviously) that could show the whole interface with no problem at all; that's where the problem arose on BitDefender AV 2012 especially on Netbooks. Due to a Netbooks miniaturized overall looks as compared to a laptop, it's not surprising that a Netbook would have a relatively smaller screen. Having a smaller screen wouldn't be a problem if only it can be scrolled vertically; but that's not the case when you're viewing an interface outside the scrolling environment and an interface mainly designed as mainly vertical would pose problem -- it did, at least on a netbook. I have BitDefender AV 2012 installed on my brother's Netbook and have been trying to configure a customized setting somewhere on the AV interface when I stumbled upon a vertical interface on which it's lower portion can't be accessed nor seen due to the Netbook screen's limited height; thus configuring the setting to our preference is nulled since I can't scroll further down just to press an "OK" button. Given that scenario, I'd like to recommend a resizable interface or at least make the interface less vertical and more horizontal for those devices that are of very limited range in terms of display.
