Maybe the installation was done as “only for me” then also the deinstall must be run as this user.
taskkill.exe /f /im V-CUBE_Meeting* MsiExec.exe /x{7BF8BF3E-BF58-4488-9EA6-821E8B3F7E5E} /qn /norestart
V-cube公司 V-CUBE Meeting软件的静默安装卸载方法步骤