Ok. It was a strange behaviour (and the first case like this) but it's solved.
Otherwise, your computer is clean.
You may use Delfix to remove every tools we used from your computer :
- Download DelFix from Xplode on your desktop.
 - Launch it with administrator rights.
 - Select all the option except the one proposing to save the registry.
 - Then click on the "Execute" button.
 - When everything is ...