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.
The standard, widely understood term. Often shortened to just アンチウイルス in conversation.
I installed antivirus software on my new computer.
Don't forget to update your antivirus software.
Literally 'virus countermeasure software'. Slightly more formal or descriptive, common in business and IT contexts.
The company computers have antivirus software installed.
Broader term meaning 'security software', often used interchangeably with antivirus software, especially in consumer contexts.
My security software is about to expire.
Referring to a particular antivirus product by name or as an application.
Used for mobile or desktop apps, especially when emphasizing the application aspect.
You should install an antivirus app on your smartphone.
Similar to アンチウイルスアプリ but slightly more formal or descriptive.
There are also free antivirus apps.
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 comes with built-in antivirus protection.
More technical phrase meaning 'pre-installed security feature'. Often used in reviews or specs.
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.
This OS has powerful built-in security features.