start by turning off system restore,
then reboot up in safe mode, using (f8) key, choose safe mode from list,
empty temp folder,
empty temporary internet files folder,
scan for viruses and spyware,
if norton still cant remove file, check path*\\\ ,, and manually move to trash,
restart normal , then empty trash,
jkhhf.dll ~may be winfixer spyware related:
try using symantec: fixvundo
tool