[Trick] How to Uninstall AutoCAD 2007 Which Have No Uninstall Features

Whos here, still using old AutoCAD software like me (in my case, 2007 version)?
(OLD SCHOOL GUY BEBEH!)

Recently, I want to uninstall it because I want to use teh newest version.
But I'm aware that I don't able to find its uninstaller feature (even in the Control Panel section).
I think the 2007 one has not include the uninstaller.

Actually, I'm just to want bypass it by installing the newest version on the spot.
However during the installation, it will display the alert that it cannot further continuing the installation due to previous version which is still installed inside my PC.
Thats a problem then.

AutoCad 2007, the greatest World Heavyweight Champion..... XD

Happily, I manage to avoid that.
Because I have found the 'screwdriver' from the internet zone.

And they said:

1. Deleting main directory where the previous version software is installed (folder "AutoCAD 2007" inside the "C:\Program Files").
2. Then, use "Regedit", search and delete this directory:
3. HKEY_CLASSES_ROOT\Installer\Products\7D2F3875100E0000102000060BECB6AB
   * (Note: The "7D2F3875100E0000102000060BECB6AB" code may be differs. Just search for the nearest code if it happens).
4. Re-try the installation.

Step 1

Step 2

That's all wot I got.