Thank you a lot, this is what i was after.

its registry again.
by the way what is the purpose of below line in the both on and off .reg files:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\AutoComplete]
"AutoSuggest"=-

Quote: Originally Posted by
debugged
Or simply untick recent items:
Start > Properties > Start Menu tab: untick "Store and display recently opened items...". Click Apply.
Thanks debugged, this is related to the task bar history and I already un-ticked it
and thank you all who contribute and shared there information with me.
Best Regards