Impossible to unintall Mysql service (no replies)

Hello,

I had to uninstall and reinstall some mysql server versions cause of framework compatibility issues. But i fall into an issue. Now i have the service MySQL still installed in windows 7. i unstalled all mysql versions that i installed previously. I deleted the folders remaining, i even delete the registry entry of the service. I proceed several reboot during these steps. But i still have a Mysql service in the Services of windows. I will certainly reinstall with a different service name for working but still i can't figure out why this service is still here and how to fix it up. Any idea are welcome.

Thanks for support.