Last Updated: 2013-04-11 02:13:03 UTC
by Mark Hofman (Version: 1)
An article in Linha Defensiva (http://www.linhadefensiva.com/2013/04/brazilian-users-unable-to-boot-windows-after-botched-update/) reports that after applying the update machines were no longer able to boot. According to the article Microsoft has recognised that there is an issue with the Brazillian version of the OS, but the links in the article do point to other locales having a similar issues.
I wasn't able to find any futher reference on the microsoft site, but in the mean time if you do approve this KB for deployment make sure you test it thouroughly prior to a production implementation.
If you've had issues with this KB please let us know.