我家的电脑因为平时下载电影，所以通常24小时上网，朋友说这样很容易被黑客袭击，而且我的电脑目前都没有防病毒的软件，请问各位，什么防病毒的软件比较好用，在哪里可以免费下载呢？谢谢

There is a type of software called antivirus software, that's what you need to look for. Costwise I have nothing to suggest, if you can get free one then good for ya. But you get what you pay. Good luck.

建议去卖正版杀毒，这样天天网上升级有保证。。才能面对，天天不断冲出的新病毒。。

thank you very much. i will look around in PC world.