Why updates protect

« An update is available » : this message is often postponed, due to lack of time, fear that « it might change something », or simply out of fatigue. Yet, installing updates is one of the most IMPORTANT gestures for your digital security — far more than we imagine. Updates are not just for adding new features: they fix SECURITY FLAWS that, if left open, expose your devices and data to hackers. Understanding WHY updates protect you will convince you never to neglect them again. Here’s the essential information.

What a security flaw really is

To understand why updates protect, you need to understand what a « flaw » is. SOFTWARE (your operating system, your applications, your internet box software…) is made up of millions of lines of code; despite all the care taken, it inevitably contains ERRORS or weaknesses; some of these weaknesses are SECURITY FLAWS: « doors » or « defects » that a hacker can EXPLOIT to gain access, take control, steal data, or install malicious software. How it WORKS: regularly, flaws are DISCOVERED (by the publishers themselves, security researchers, or unfortunately, hackers); once a flaw is known, it’s a race: the publisher releases an UPDATE (a « patch », a « fix ») that CLOSES the flaw; but hackers, on their side, try to EXPLOIT this flaw on devices that have NOT yet installed the fix. The CRUCIAL point: as long as you haven’t installed the update, the flaw remains OPEN on your device; and since the flaw is now KNOWN (published), hackers know exactly how to exploit it; an unupdated device is therefore an EASY target; it’s even one of the main ways devices and accounts get hacked: through KNOWN but UNFIXED flaws due to lack of updates. AUTOMATED attacks: hackers don’t need to target you personally; automated programs SCAN the internet for vulnerable devices (unupdated) to attack them en masse; all it takes is being exposed to be affected, without being a « target » in particular. The PARADOX of published flaws: when a flaw and its fix are announced, this also informs hackers of its existence; hence the importance of installing the fix QUICKLY (before they exploit the flaw on your still vulnerable device). What you need to remember to start: software inevitably contains security flaws; updates FIX them (they « close » them); as long as you don’t install them, these flaws remain open and exploitable by hackers, who know them and exploit them automatically en masse; installing updates is closing these doors before someone rushes in. That’s why updates protect: they are your first line of defense against hacking. Let’s look at this in more detail.

Why and how updates protect you

Let’s detail the protective role of updates, beyond just fixing flaws. FIXING security flaws (the main role): each security update closes recently discovered flaws; by installing it, you close doors that hackers could use; it’s direct and essential. Protection against VIRUSES and malicious software: many malicious programs exploit flaws to install themselves; an updated system is far less vulnerable to these attacks (our guides on protecting against viruses). Protection of your DATA and ACCOUNTS: flaws can allow stealing your personal data, your passwords, accessing your accounts; fixing them protects all of this. Fixing BUGS: beyond security, updates repair malfunctions and crashes; your device works better and more reliably. Continuous improvement: they also bring improvements and sometimes new protections (enhanced security features). COMPATIBILITY: staying updated ensures your applications and services continue to work and be secure. WHICH software to update? All connected software or software handling data: the OPERATING SYSTEM of your devices (phone, computer, tablet — the most important), your APPLICATIONS (they also have their flaws; keep them updated, often automatically via app stores), your INTERNET BROWSER (a major entry point; it often updates itself), and even often FORGOTTEN devices: your internet BOX/router (which also has software to update — it often does it automatically, but check), and connected objects. TIME matters: install security patches QUICKLY after their release; the longer you delay, the longer your device remains vulnerable to a now-known flaw. The best REFLEX: enable AUTOMATIC UPDATES; thus, security patches install themselves (often at night), and you stay protected WITHOUT thinking or risking forgetting; it’s the simplest and most effective gesture. In summary: updates protect you by fixing flaws (preventing hacking), reducing vulnerability to viruses, protecting your data and accounts, and fixing bugs; update ALL your software (system first, but also applications, browser, box), QUICKLY, and ideally by ENABLING automatic updates to miss nothing. It’s your first-line shield.

• Fix security flaws that hackers exploit
• Protect against viruses and malware
• Safeguard your data and accounts
• Repair bugs and improve performance
• Maintain compatibility with other software

The most effective gesture: enable automatic updates. If you were to do only one thing for your digital security, this would be it: enabling AUTOMATIC UPDATES on your devices. Why is this the best reflex? Because the main obstacle to security is not not knowing how to update, but FORGETTING or POSTPONING; we put it off to « later », and the device remains vulnerable for weeks; automation eliminates this problem: security patches install THEMSELVES, usually at night when the device is plugged in and connected to WiFi; you stay protected permanently, without effort or forgetting. How to do it: in your devices’ settings, look for the update options (often under « General » → « Software Update » on iPhone, or equivalent) and enable automatic updates; do the same for APPLICATION updates (via app stores); your browser usually updates itself, but check it; and for your internet BOX, the update is often automatic on the operator’s side, but occasionally restarting the box helps. Thus, the essential stays up to date without you having to think about it. A few useful details: enable at least SECURITY updates automatically (they are the most important, and they are usually quick and invisible); for LARGE new major versions (once a year), some prefer to install them manually after a little time (to let any early bugs be fixed); that’s a reasonable choice, but don’t confuse it with security patches, which should not be delayed. And keep the reflex to BACK UP your data regularly (automatic cloud takes care of it), to be serene in all circumstances (our guides on backing up your data). By enabling automatic updates, you turn security from a forgotten chore into permanent and invisible protection; it’s the best effort/protection ratio there is — a one-time setting, and you stay protected against fixed flaws, continuously, without thinking. It’s by far the most effective security advice for most people; don’t neglect it.

The danger of devices that are no longer updated

A little-known but crucial aspect: what happens when a device NO LONGER receives updates? THE END of support: every device (phone, computer, tablet) and every software is only updated for a LIMITED TIME; after a certain age, the manufacturer STOPS providing updates (including security ones); the device or software becomes « obsolete » from the support point of view. THE RISK: from then on, new flaws discovered will NEVER be fixed on this device; they remain open indefinitely; the device becomes more and more VULNERABLE over time (flaws accumulate, known and exploitable); using a device that no longer receives security updates for SENSITIVE uses (online banking, purchases, personal data, important emails) becomes RISKY. What this IMPLIES: an old device may still « work » perfectly for basic uses, but from a SECURITY point of view, it’s no longer reliable for sensitive uses; it’s a sign that you’ll eventually need to REPLACE it — not due to forced obsolescence or to « consume », but for your SECURITY (our guides on when to change your device). How to KNOW? Find out about the support duration of your device; if it hasn’t received updates for a long time, or if the manufacturer has announced the end of support, that’s the sign. The case of OBSOLETE SOFTWARE: this also applies to software (an old operating system that’s no longer updated, an old browser); using software that no longer receives security fixes is risky; switch to a supported version. What to DO in the meantime? If you must use an old device: limit it to NON-sensitive uses (avoid banking, purchases, important personal data on it); reserve sensitive uses for an updated and secure device; and plan its replacement. REASONABLE EXTENSION: a still-supported but somewhat old device can often be kept (security updates still provided); it’s the END of security support that marks the true limit, not just the age. In summary: a device or software that NO LONGER receives security updates becomes progressively vulnerable and risky for sensitive uses; it’s an important signal not to ignore; in the meantime, confine it to non-sensitive uses; keeping a device updated (and replacing it when it’s no longer supported) is part of the protection.

Warning: postponing updates exposes you, and beware of FAKE updates. Several traps around updates can compromise your security. The most common trap: POSTPONING updates indefinitely; every day you delay installing a security patch, your device remains VULNERABLE to a now-KNOWN and exploited flaw by hackers; « I’ll do it later » leaves the door open; install security patches QUICKLY (or enable automatic updates). Don’t consider updates as an optional chore; they are your first defense against hacking. Second trap, very DANGEROUS: FAKE updates and disguised scams; scammers imitate update requests to trick you; be ABSOLUTELY wary of pop-ups, emails, SMS, or messages urging you to « urgently update », install a « security patch », or download something via a link; REAL updates for your system only come through your device’s official settings (or automatically), NEVER through an external link, a pop-up on a site, or a received message; an « update » offered by a suspicious link or window is almost always an attempt to install MALICIOUS software (our guides on recognizing scams). NEVER download an update from an unofficial source: only through official channels (device settings, official app stores, official publisher sites). Third point: don’t INTERRUPT a real update in progress (don’t turn off the device during installation); it could make it unstable; make sure you have enough battery (plug it in) and let it finish. Fourth point: BACK UP before a major update (as a precaution, in case of rare issues — our guides on backing up your data). Fifth point: don’t ignore the case of devices AT THE END OF SUPPORT: a device that NO LONGER receives security updates becomes increasingly vulnerable; don’t use it for sensitive uses (banking, personal data), and consider replacing it for security. Sixth point: don’t forget the « invisible » devices: your internet BOX/router and your connected objects also have software to keep updated (often automatically, but check, and occasionally restart the box). Don’t confuse the fatigue of updates with a real risk: yes, it can be annoying, but the protection they provide is real and important; don’t disable them out of annoyance. By installing patches quickly (ideally automatically), only going through official channels (never a suspicious link), not interrupting an update, and replacing end-of-support devices for sensitive uses, you make updates the effective shield they should be — without falling into the traps of fake updates that, they, seek to harm you.

Frequent questions

Why are updates so important for security?

Because they fix SECURITY FLAWS that, otherwise, expose your device to hackers. Here’s the mechanism: every software (system, applications, browser, box…) inevitably contains weaknesses, some of which are SECURITY FLAWS — « doors » that a hacker can exploit to gain access, steal your data, take control, or install malicious software. Regularly, these flaws are discovered; the publisher then releases an UPDATE (a fix) that closes them. The key point: as long as you don’t install this fix, the flaw remains OPEN on your device; and since the flaw is now KNOWN (published), hackers know exactly how to exploit it; an unupdated device becomes an EASY target. Worse: hackers don’t need to target you personally; AUTOMATED programs scan the internet to find and attack en masse vulnerable devices (unupdated); all it takes is being exposed to be affected. It’s actually one of the main ways devices and accounts get hacked: through KNOWN but UNFIXED flaws due to lack of updates. By installing updates, you CLOSE these doors before someone rushes in; it’s your first line of defense. Beyond flaws, updates also reduce vulnerability to viruses (which often exploit flaws), protect your data and accounts, and fix bugs. That’s why they’re so important: they’re not just optional « new features », but fixes that actively protect you against hacking. Neglecting them is leaving doors open; installing them (ideally automatically and quickly) is protecting yourself.

Should you install updates immediately?

For SECURITY patches: yes, quickly; for major new versions: you can nuance. SECURITY patches (often small updates) must be installed QUICKLY after their release: each day of delay leaves your device vulnerable to a now-known and actively exploited flaw by hackers; the longer you delay, the longer the door remains open; these updates are usually quick and invisible (just protection), so no reason to postpone them. The best way not to forget: enable AUTOMATIC UPDATES (at least for security); the device installs them itself, often at night; you’re protected continuously without thinking. For MAJOR new versions (a major system overhaul, about once a year): there, you can nuance; some prefer to wait a few days or weeks after their release, time for any small early bugs to be fixed by a subsequent update; it’s a reasonable choice, especially on a somewhat old device; but don’t confuse: this caution concerns MAJOR versions, NOT security patches (which must be installed quickly). In practice: let security patches install automatically and without delay; for a major version, you can take a little time if you’re cautious. In all cases, don’t POSTPONE indefinitely: a never-updated device accumulates vulnerabilities. And think about BACKING UP before a major update (as a precaution). In summary: yes for security patches (quickly, ideally automatically), with a little time possible for major versions; don’t confuse the two, and never neglect security.

My device is old and no longer receives updates: is it serious?

It’s an important signal for your security, not to be ignored. Every device is only updated for a limited time; after a certain age, the manufacturer STOPS providing updates, including SECURITY ones. From then on, new flaws discovered will NEVER be fixed on your device: they remain open indefinitely, and the device becomes more and more VULNERABLE over time (known flaws accumulate, exploitable by hackers). Concretely: your old device may still « work » normally for basic uses, but from a SECURITY point of view, it’s no longer reliable for SENSITIVE uses. What to do? Ideally, consider REPLACING it — not due to forced obsolescence, but for your security (using a device that no longer receives fixes for your banking, purchases, personal data is risky). In the meantime, if you must continue using it: LIMIT it to NON-sensitive uses (basic browsing, offline games…), and avoid doing your banking, purchases, or storing/manipulating important personal data on it; reserve these sensitive uses for an UPDATED and secure device. How to know if your device is no longer supported? Find out about the support duration of your model; if it hasn’t received updates for a long time, or if the manufacturer has announced the end of support, that’s the case. This also applies to OLD SOFTWARE (an old system, an old unsupported browser): switch to a supported version. Nuance: a somewhat old but STILL SUPPORTED device (still receiving security fixes) can be kept without issue; it’s the END of security support that marks the true limit, not just the age. In summary: yes, it’s a real security issue; a device that no longer receives security updates becomes risky for sensitive uses; confine it to non-sensitive uses in the meantime, and plan its replacement to stay protected.

What to remember

Installing updates is one of the MOST IMPORTANT gestures for your digital security. Why? Every software (system, applications, browser, box) inevitably contains SECURITY FLAWS — « doors » that hackers can exploit to steal your data, take control, install malicious software. Updates FIX these flaws (they « close » them). Crucial point: as long as you don’t install the fix, the flaw remains OPEN, and since it is now KNOWN, hackers exploit it — often AUTOMATICALLY and en masse (no need to target you personally: it’s enough to be vulnerable); it’s one of the main causes of hacking: known but unfixed flaws due to lack of updates. Installing updates is closing these doors before someone rushes in. They also protect against viruses (which exploit flaws), secure your data and accounts, and fix bugs. Update ALL your software: the SYSTEM (priority), APPLICATIONS, BROWSER, and forgotten devices (internet BOX, connected objects). The most effective GESTURE: enable AUTOMATIC UPDATES; security patches install themselves (often at night), and you stay protected without effort or forgetting — it’s the best effort/protection ratio. Install security patches QUICKLY (for major new versions, a little time is possible; but don’t confuse them). Beware of FAKE updates: real ones only come through official channels (device settings, official stores); NEVER click on an « urgent update » offered by a pop-up, email, or link (it’s a scam to install malicious software). Don’t interrupt an update in progress, and back up before a major version. Finally, a device AT THE END OF SUPPORT (no longer receiving security fixes) becomes increasingly vulnerable: don’t use it for sensitive uses (banking, personal data), and consider replacing it for security. Updates are not an optional chore: they are your first-line shield against hacking; by enabling them automatically and never neglecting them, you protect yourself effectively, without effort.