If you removed the Factory Sounds from TRAKTOR, you can re-import them as described below.
The default directory for TRAKTOR's Factory Sounds is:
Macintosh HD > Library > Application Support > Native Instruments > Traktor 2 > Factory Sounds
C: > ProgramData > Native Instruments > Traktor 2 > Factory Sounds
Note: In order to view the folder "ProgramData" you need to make hidden folders visible. If you don't know how to do this, read the article "How to enable the view of hidden files and folders on Windows systems" linked below this article.
To import the Factory Sound files into TRAKTOR, proceed as described below:
1. Open TRAKTOR
2. Select all files in the folder (Mac: Cmd+A; Windows: Ctrl+A)
3. Drag & drop the files on the Track Collection icon in the TRAKTOR browser
If you activated your TRAKTOR software from a Demo installation, the Factory Sounds are not installed on your computer. In this case, install TRAKTOR again, either from the installation DVD or with a full download installer.