Basically, this workaround had to be issued in a jiffy simply because successful Duqu-based attacks would open up the door for attackers to run arbitrary code in kernel mode, giving them a free reign to install programs, view, change or delete data, or even to create new accounts that come with full user rights. Microsoft says that they are still developing a permanent fix to the software, and rest assured that this fix will be included in either a future monthly update or an out-of-band patch.
As usual, we would advise all Ubergizmo readers to always be cautious around the Internet, downloading files only from certified-safe sites, and make sure your anti-virus software is up to date. Always.