Assuming you know about editing keys in the Windows registry -
- Go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{installed application}
- You may not be able to see the application by its name. Search for the application name under the Uninstall folder.
- When you find your application, which will have a folder for itself. Under this, you will find atleast two entries - DisplayName and UninstallString.
- Rename the names of the keys (not their values) to say DisplayName_1 and UninstallString_1.
This should prevent them from being listed; and also facilitate to unhide them when you want to upgrade/apply a patch for that application.