Microsoft has issued an alert warning of a potential security threat to the Windows operating system.
Who Should Read this Document: Customers who use Microsoft Windows
Impact of Vulnerability: Remote Code Execution
Maximum Severity Rating: Critical
Recommendation: Customers should apply the update immediately
Apparently there are an increasing number of criminal groups targeting the vulnerabilities that this patch fixes and they are using it to silently install software when users visit a malicious Web site or open a certain types of e-mail.
It is strongly recommended that you apply the security patch immediately.
You can do this via the links listed at the security site linked above or by running Windows Update or by visiting windowsupdate.microsoft.com.