Translation guide
Software designed to detect, prevent, and remove malicious software (malware) from computers and devices.
The most common, neutral way to refer to antivirus software in Japanese.
Referring to a particular antivirus product by name or as an application.
Used for mobile or desktop apps, especially when emphasizing the application aspect.
スマホにアンチウイルスアプリを入れたほうがいいよ。
You should install an antivirus app on your smartphone.
Referring to antivirus features that come with the operating system, like Windows Defender.
Means 'standard/built-in virus protection'. Used when talking about OS-integrated security.
Windowsには標準のウイルス対策がついています。
Windows comes with built-in antivirus protection.
In everyday conversation, アンチウイルスソフト is often shortened to just アンチウイルス. For example: 「アンチウイルス入れた？」 (Did you install an antivirus?).
Both are common, but アンチウイルス is more direct and modern, while ウイルス対策 is slightly more formal and descriptive. In IT contexts, ウイルス対策ソフト is very standard.
The standard, widely understood term. Often shortened to just アンチウイルス in conversation.
新しいパソコンにアンチウイルスソフトをインストールした。
I installed antivirus software on my new computer.
アンチウイルスソフトの更新を忘れずに。
Don't forget to update your antivirus software.
Literally 'virus countermeasure software'. Slightly more formal or descriptive, common in business and IT contexts.
会社のパソコンにはウイルス対策ソフトが入っています。
The company computers have antivirus software installed.
Broader term meaning 'security software', often used interchangeably with antivirus software, especially in consumer contexts.
セキュリティソフトの期限が切れそうだ。
My security software is about to expire.
Similar to アンチウイルスアプリ but slightly more formal or descriptive.
無料のウイルス対策アプリもあります。
There are also free antivirus apps.
More technical phrase meaning 'pre-installed security feature'. Often used in reviews or specs.
このOSは標準搭載のセキュリティ機能が強力だ。
This OS has powerful built-in security features.