Critical Quicktime Flaw
Apple is encouraging users of Quicktime to upgrade to the latest version due to a critical flaw which could allow malicious sites to execute code on your PC.
Details here:
http://www.informationweek.com/news/showArticle.jhtml?articleID=199203215
There is no patch. You have to download and install the latest version of the program.
PC users download here:
http://www.apple.com/support/downloads/quicktime716forwindows.html
Mac users download here:
http://www.apple.com/support/downloads/quicktime716formac.html
I personally use Quicktime Alternative (Media Player Classic) to view Quicktime files.
It's available here
http://www.free-codecs.com/download/QuickTime_Alternative.htm
and here
http://codecguide.com/download_qt.htm