After I performed a upgrade from Windows 95 to Windows 2000 Pro I noticed two (2) new files on my desktop. One was kfile.kcs and the other was kactiv.kc8. I wasn't sure what type of files these were so I tried to open the .kcs file using wordpad. Well I spaced out the check box saying to use this program to always open this type of file and now I would like to put it back as "Unknown". Basically I would just like to know how to unassociate a file extension with a program. Can it be done?? Personally I'm not that concerned with what these files are since the machine is running fine. Just curious. Thansk in advance