Interestin read...
QuoteOn October 22nd, we settled in at SophosLabs and loaded a full release copy of Windows 7 on a clean machine. We configured it to follow the system defaults for User Account Control (UAC) and did not load any anti-virus software.
We grabbed the next 10 unique samples that arrived in the SophosLabs feed to see how well the newer, more secure version of Windows and UAC held up. Unfortunately, despite Microsoft's claims, Windows 7 disappointed just like earlier versions of Windows. The good news is that, of the freshest 10 samples that arrived, 2 would not operate correctly under Windows 7.
http://www.sophos.com/blogs/chetw/g/2009/11/03/windows-7-vulnerable-8-10-viruses/
Oh joy. :(
Just another big firm bashing microsoft.
A post over at neowin is a much better read about that story, http://www.neowin.net/news/main/09/11/04/sophos-windows-7-vulnerable-to-810-viruses-fud-alert
The Neowin article is certainly more balanced.