There is an option start menu properties.
Right click start icon bottom left of desk top.
Left click 'Properties'
now remove ticks from the 'Privacy' option.
Left click 'Apply'
Is this what you are looking for?
OR:-
To disable recent documents history:-
Go to Start -> Run -> type regedit and enter
Browse to HKEY_CURRENT_USER\ Software\ Microsoft\ Windows\ CurrentVersion\ Policies\ Explorer
Create a DWORD value with the key NoRecentDocsHistory and set the value to 1
Done, you have just disable recent documents history.
Please logoff or restart your pc to get the recent documents history take effect.
If you are in multi user computer, you can disable recent documents history once for all user. Just follow the steps below to disable recent documents history:-
Go to Start -> Run -> type regedit and enter
Browse to HKEY_LOCAL_MACHINE\ Software\ Microsoft\ Windows\ CurrentVersion\ Policies\ Explorer
Create a DWORD value with the key NoRecentDocsHistory and set the value to 1
Done, you have just disable recent documents history.
Please logoff or restart your pc to get the recent documents history take effect.
NOTE:-
In Windows 7 though there is no key for ‘Explorer’ in the ‘Policies’ key, but all you have to do is add a key named ‘Explorer’ in it and then create the required DWORD Value.
Remember always do reg backup and create system restore point before working in registry.
Hope this of help