An unknown virus has just attacked my computer.

一种未知的病毒刚攻击了我的电脑。

youdao

My computer has just been attacked by an unknown virus.

我的电脑被一种不知名的病毒攻击。

youdao

In order to prevent the Trojan invasion, the computer to install and update anti-virus software upgrade, not open the unknown email, no computer access to the internet.

为防止木马侵入，计算机要安装杀毒软件并及时更新升级，不随意打开不明电子邮件，严禁将涉密计算机接入互联网。

youdao