Hi,
To prevent a program from being displayed in the Most Frequently Used
Programs list:
1. Go to Start/Run/Regedit and navigate to this key:
HKEY_CLASSES_ROOT\Applications\<Program name.exe>
2. Add an empty string value named NoStartPage to the registry key mentioned
above, where <Program name.exe> is the name of the executable file that is
used to start the program.
3. Quit Registry Editor, and then restart the computer.