Does Windows Defender in Win8 count as an AV? People seem to like it and I'm tempted to just roll with it if I don't need Avira or something. From MS's page on W8:
We recommend that you use an antimalware app to help protect your PC from malware and other potentially harmful software, and that you keep the app up to date. Windows Defender is a feature of Windows 8 and is enabled by default in Windows 8 Release Preview. If you prefer to use any of the antimalware apps listed on this page, Windows Defender will silently turn itself off so that the antimalware app you choose can help protect your PC.