Class not registered (Error: 80040154; Source: Windows)

After setting up a new ConfigMgr site, I was testing OSD using a migrated task sequence. We use an HTA front end that collects some basic information about the user: department, building, room, role, etc. This HTA is part of a small package we built in ConfigMgr. However, when we selected the task sequence and the package tried to load, the task sequence failed:

A Google search did not shed any light on the issue. That's why I'm posting this blog, maybe it will help some poor soul.

The reason for this error is HTA support is not enabled by default in WinPE. Without it, HTA files fail to run. You can enable this by doing the following:

From the ConfigMgr console, navigate to Overview - Operating Systems - Boot Images. Right click your boot image (we use the x64 image), and select Properties. Click the Optional Components tab and check HTML (WinPE-HTA). We also added a few more options, such as PowerShell.

Once you do this, you will need to follow the steps to update your boot image.