If you are only using the Classic client or installed the Premium client using the full Premium installer than you are not affected.

If you upgraded from the Classic client to the Premium client, using the content upgrade, then please read on.

Check the root directory of your hard drive and see if you have a boot.ini file, if so then you are not affected. The file is normally hidden so you need to click Tools : Folder Options : View and select "Show hidden files and folders" and uncheck "Hide protected operating system files" to be able to see it.

You can also check for the presence of this file by clicking Start : Control Panel : System : Advanced : Startup and Recovery : Settings (third button down). Windows will alert you if the boot.ini file is missing.