Microsoft released a patch to the latest security vulnerability to Internet Explorer (IE) today at 11:00 am.
IT folks are currently testing the patch, and will want to install it stating Friday night.(5/2/2014)
We usually ask that you leave your computer powered up on Tuesday nights, BUT FOR THIS WEEK we ask that you leave your computer powered up all weekend so that we can install the patch and have your computer ready to go for you Monday morning.
Technical detail here.