A trail copy of office and works are preloaded on many machines, especially HPs. They share several dll files which are removed during uninstall so if you remove the trail copy of office the word processor part of works will not function. ltkrn13n.dll is one of the shared files. It needs to reside in both the windows/system32 AND the program files/microsoft works directories. Either:
1. go to a site like
www.dlldump.com and download the file into each directory or
2. search your harddrive for the file. chances are it is residing in other directories on your machine for use by other programs. copy the file into the system32 and microsoft works directoies.
Try works again. you'll probably get the same error as before but it will call out a different dll. Ltdis13n.dll is most likely. repeat procedure for that file. you may have to do this several times until you've restored all the missing files.
It's possible you could shorten the process by going to microsoft's website and downloading their word viewer. That may reinstall some of the files, I don't know. You can definitely fix the problem with the brute force process described above.