We run SQL Server 2012 Standard on a Windows 2008 Enterprise R2 SP1 box and I had been trying to install Service Pack 1 for SQL 2012 and the installation failed via Windows Update and manual install.
It turns out that for the default location for our LOGS uder database settings we had the wrong path and by fixing the path I was able to successfully install SP1 and the hotfix afterwards.
Just wanted to share this info in case anyone out there runs into a similar issue.
Rene Caballero