Apple has just posted a security update for OSX.
If your software is not set up to automatically update, please head here:
Microsoft Security Update
Microsoft have issued a security patch that you should download and install, if it hasn't already been applied automatically via Windows Update.
Here is the web address:
http://www.microsoft.com/technet/security/bulletin/ms10-002.mspx
where you can read all the details.
Click on the Component that matches your version of Internet Explorer, along with your version of Windows.
Adobe
There's yet another Acrobat update that fixes a security hole in Acrobat Version 8 & 9 and Acrobat Reader.
We urge you to always turn off Javascript under preferences, and run the update to keep your version safe.