You can do a search and repace K:\ with C:\, hoping that nothing else uses K:\ aside from the drive letter. I'd do a registry backup before you try though, maybe even a system restore point.
i used regedit to export a backup *.reg file. Seems regedit only can edit one element at at time? So, I then did a K: to C: replace with a text editor. I then tried to merge the new corrected *.reg file, but an error comes up stating it cannot merge because stuff is in use.
"Not all data was successfully written to the registry. Some keys are open by the system or other processes"
so i think i have a corrected *.reg file, how to i get it into the registry?