It's still not safe...

Over the last couple of weeks I have had several clients have their Windows PCs infected with malware. The PCs were running antivirus software and at least two of the users said that they had not opened anything that had been sent to them as an attachment. One fix was simple enough and required running a removal tool and a follow up scan with good anti-virus software. However, the others required that the hard drives of the computers be erased and Windows reinstalled.
If you are running Windows on your Mac and doing any kind of web browsing with it. I think that it is important to make sure that Adobe Flash and Java are both up to date and/or disabled in the browser. Try not to use Internet Explorer and/or don't browse the web while logged in to Windows. Make sure that your Window's if fully patched and has all of the latest updates from Microsoft. If you are running a version of Windows that supports it, set a restore point that you can go back to in case you do get malware on your computer.