マルウェア（ウイルス等）とは？ | 国民のためのサイバーセキュリティサイト

This page from a government cybersecurity site explains malware and viruses. Malware is malicious software that infiltrates computers through emails and webpages, including variants like bots, ransomware, spyware, and trojans. Common infection routes include browsing compromised websites, installing fake security software, opening email attachments, USB devices, and file-sharing software. The page emphasizes that keeping software updated and maintaining current antivirus protection are essential preventive measures against malware infections.