Merry Christmas ! Please could one of the forum experts kindly let me know their interpretation of the following:- A root scan with my recently purchased Avira Premium revealed one hidden item in the registry which it can't 'flag' as it is invisible. The key is: Starting search for hidden objects. HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\System\oodefra g06.00.00.01workstation [NOTE] The registry entry is invisible. '419492' objects were checked, '1' hidden objects were found. It does not seem to spawn any processes (Process Explorer) and there is nothing unusual in Autoruns (Sysinternals). RKU also does not find any suspicious hooks. Have also scanned in safe mode with SAS, and in normal mode with a2 and AVGAS. Nothing there either. I cannot open the registry key (i.e. \System) in regedit - " Error while opening key", maybe it is protected ? My computer running Win. XP SP2 (Ubuntu on another drive), has never performed as good. Absolutely no problems. BTW. oodefrag was uninstalled by me over 2 years ago. Is the System key mentioned a normal entry ? (Have also posted in Avira forum.) Regards.