CBS

Microsoft Component-Based Servicing (CBS) is part of the servicing stack. The servicing stack is a set of files and resources that are required to service a Windows image or operating system.

Configuring Windows Updates stage stops at 15 percent completion – Reverting changes

For an extended time we are trying to install Windows Updates on our machines, but this always fails with error message Failure configuring Windows Updates. Reverting changes when the system reboots. In case all the update rolling back and you are back to no update installed. This happens typically if you install Windows 2012 Core from DVD and try to install all the available Microsoft hotfixes. After a few months with Microsoft this has been escalated MS internally and they identified coldfusion.exe has an open file handle on TTF font files. It looks like Microsoft does not add the TTFs to pending files for rename list and just replace them on reboot from my point of view.

After lot of digging we found an interfering process that causes an update failure of tahomabd.ttf, see C:\Windows\Logs\CBS\CBS.log on the affected machine:

CBS