Ninja tips

Summary: Hiding the real extension in an excutable file using RLO unicode character.

You may be already familiar with hidden extensions and probably changed icon.
Here see some examples: danger.txt.exe , danger.flv.txt.vbs
You may be more prepared for these types of files and know how to get around them. BUT 

Is Junk filled inside your Add and Remove list. Does it take so much time to load all the programs list in Add and Remove in Windows Control Panel? Then this for you.

1. Open the Start menu >> Run. Then type regedit in search box, then press Enter. 
2. Navigate now to this registry key: HKEY_LOCAL_MACHINE >> SOFTWARE >> Microsoft >> Windows >> CurrentVersion >> Uninstall
3. Remove any sub keys or just see the information listed.

Open , and remove any unwanted subkeys under "Uninstall."
You can use this method if you develop programs for windows too.