# [Tex/LaTex] Making document classes in LyX available

document-classesletterslyx

I'm writing a letter in LyX, and I want to choose a document class for it. (I don't like the default letter.)

Looking at Document -> Settings -> Document class, I see that most classes are "unavailable". For example, Unavailable: Letter (KOMA-script). How do I make those available?

I tried installing the koma-script package in the MiKTeX package manager, but it didn't help.

EDIT:

Here's the dialog I get when doing Reconfigure:

## LyX: System reconfiguration failed

The system reconfiguration has failed.
Default textclass is used but LyX may not be able to work properly.