Dare to eat crabs! 3.0 uninstall report

Yahoo assistant 3.0 claimed that it could be uninstalled cleanly and did not believe it. So I ate a crab once. It turns out that my question is quite pessimistic. Maybe our method is wrong. Please advise Yahoo! How to uninstall it correctly?

Uninstall function test:

First look at the rogue software in the system before installation

We can see that there are no other hooligans except the ones that cannot be deleted.

Then download Yahoo 3.0 and install it. During the installation process, let you select the real name of the Installation Network. I was angry that duck guard didn't allow me to select the installation path and hit drive C. Grandma's day.

Scan once with software

Confirmed that the hooligans were infected and then uninstalled. There is no unmount option in the Start Menu. Go to the control panel and click "unmount". The system will automatically access the Internet and ask for comments. Then click Uninstall immediately. Uninstalled

However, when I return to the control panel again, the unload item of Yahoo assistant is still there.

Again using software scanning, Yahoo is still there.