Combating Malware

The first line of defence against malware is recognising that it exists and that it keeps evolving. No single tool or habit makes a system permanently safe, so the practical approach is a layered one: spot the signs of an infection early, and then follow a set of preventive habits that stop malware from getting in at all. Prevention matters more than cure, because once malware is inside, it can corrupt data, steal credentials, or spread to other machines before you even notice.

Recognising an infection

Malware rarely announces itself, but it leaves traces. The common signs to watch for include:

• frequent pop-up windows that push you to visit a website or download software;
• your browser's default homepage changing on its own;
• mass emails being sent from your email account without your knowledge;
• a computer that is unusually slow and crashes often;
• unknown programs starting up automatically when you switch the computer on;
• programs opening and closing by themselves;
• a sudden loss of storage space, along with random messages, sounds, or music appearing;
• files or programs appearing or disappearing without your involvement.

None of these alone proves an infection, but several appearing together is a strong warning.

Preventive measures

Because malware evolves, the countermeasures must be maintained, not just installed once. The book lists a practical set of habits:

• Use antivirus, anti-malware, and related software, and update them regularly.
• Configure your browser's security settings.
• Before making any online payment, check for a lock icon in the address bar.
• Never use pirated or unlicensed software; prefer Free and Open Source Software (FOSS) instead.
• Apply software updates and patches released by the manufacturers.
• Take regular backups of important data.
• Enforce firewall protection on your network.
• Avoid entering sensitive information such as passwords or PINs on unknown or public computers.
• Avoid entering sensitive data on an unknown network, like public Wi-Fi, even from your own computer.
• Do not click on links or download attachments from unsolicited emails.
• Scan any removable storage device with antivirus software before transferring data to or from it.
• Never share your online account or banking passwords and PINs with anyone.
• Remove all programs you do not recognise from your system. …