Registry Problem

Hey there all, I have had a problem with a key in my registry that wont seem to fix. The problem lies in:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\c6rncf1.exe

C:\WINDOWS\System32\c6rncf1.exe /k

I have tried deleting the file manually but I know that deleting keys in HLM doesnt work. I have also tried variable software registry programs such as norton utilities and registry mechanic. Please could anyone help me with this problem,

Cheers – Simon