Windows 7 vulnerable to 8 out of 10 viruses
From Sophos:
Now that we in the northern hemisphere have had some time to digest the Windows 7 hype and settle in for the coming winter, we thought we would get some more hard data regarding Windows 7 security.
On 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.
More in http://www.sophos.com/blogs/chetw/g/2009/11/03/windows-7-vulnerable
hmmm UAC is not to stop malware. Antivirus/Antimalware will. MSRT by MS will remove existing malware but not UAC.