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4.清除根目录中的病毒和恶意软件
Nothing will slow your system down like a virus, a Trojan horse, or other types of malware. Plenty of commercial antivirus applications are available for Windows PCs, but Becky recommends trying Microsoft's free Security Essentials suite, which will sweep your system for any unwanted, nefarious software and provide ongoing protection via regular updates. Just visit Microsoft's Security Essentials website, download and install the software, and follow the instructions.
没有任何东西比病毒，特洛伊木马或者其他恶意软件更能减慢你系统速度的了。现在市面上有各式各样的Windows杀毒软件，但是贝奇推荐你试一试微软的免费安全套装，它将扫除你系统中所有不想要的东西和不法软件，并通过提供定期更新来保护系统。只需要访问微软安全网站（译者注：已链接到中文版地址），按照指示下载并安装该软件即可。
