cant install AutoCad previously installed but it doesnt work so i uninstalled it now while im installing saying that ur already installed autocad and saying want to remove remove in control panel there i cant see nothing about AutoCad
Use Revo on Advanced mode and delete pretty much everything that shows up after the typical uninstall. Then you should be able to install ACAD again.
Are you sure that the setup says ACAD is already installed? Don't you mean DWF Viewer, DWG TrueView or Vault? Cause it's they who usually remain on the computer after uninstalling Autocad.