Centos 7 Problemas de instalação [fechados]

Question

Eu quero instalar CentOS 7 em uma máquina virtual com caixa virtual, mas quando escolho a opção °Tes this media and install centos 7° , recebo este erro:

    Checking: 090.5%

The media check is completed, the result is: Fail

It is not recommended to use this media.
[Failed] Failed to start Media Check on /dev/sr0
See ´systemctl status [email protected]´for details.
[ 191.018148 ] dracut-initqueue[540]: Job for [email protected] failed because the control process exited with error code. See "systemctl status [email protected]" and "journalctl -xe" for details.
[ 191.552636 ] dracut : FATAL: CD Check failed!
[ 191.554295 ] dracut: Refusing to continue
[191.874800 ] System halted.

O que eu posso fazer? Tenha um bom dia