Not every PC gets replaced the moment a new version of Windows arrives. Plenty of perfectly good machines still run Windows 10, and a smaller but stubborn group still boots into Windows 7. Some owners hold on because of legacy software, some because their hardware can't meet Windows 11's requirements, and some simply because the computer still does the job.
There's nothing wrong with getting a few more years out of good hardware. The catch is that "older" doesn't mean the same thing for every version of Windows. In 2026, a Windows 10 PC and a Windows 7 PC face very different levels of risk, and each needs a slightly different game plan. Here's what has changed and how to keep both of them safe.
Where Windows 7 And Windows 10 Stand Toda
Windows 10 officially reached the end of support in October 2025, but it isn't abandoned yet. Home users can join Microsoft's Consumer Extended Security Updates (ESU) program, and in June 2026 Microsoft quietly extended it by another year. Enrolled PCs running Windows 10 version 22H2 will now receive critical and important security updates until October 12, 2027. You can enroll for free by syncing your settings with a Microsoft account; other options include redeeming 1,000 Microsoft Rewards points or making a one-time payment.
Windows 7 is in a very different place. Microsoft stopped supporting it back in January 2020, so the operating system hasn't received public security patches for years. Google Chrome and Microsoft Edge have dropped it too. Firefox ESR 115 is the last major browser still getting security fixes on Windows 7, and Mozilla currently plans to support it until March 2027. That date has already moved several times, though, so it's best treated as a temporary lifeline.
In short, Windows 10 is on extended life support with a clear end date, while Windows 7 is running without a safety net.
Why Browsing Is The Weakest Spot On Older PCs
Once an operating system falls behind on patches, the web becomes its most dangerous neighbourhood. Attackers rarely need a sophisticated exploit to reach an older PC. More often, the path starts with something ordinary:
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a malicious ad (malvertising) on a legitimate website;
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a fake "Download" button that installs something you didn't ask for;
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a "Your PC is infected" pop-up pushing a bogus cleanup tool;
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a phishing page that looks exactly like your bank or email login.
On a fully updated system, some of these attacks hit a wall. On an unpatched one, a single bad click can go much further, because vulnerabilities that would normally be closed are still wide open.
Browser extensions help, but they have limits on older setups. They only protect what happens inside the browser, and on Windows 7 they depend on a browser that is itself nearing retirement. Ads and trackers inside desktop apps aren't covered at all.
Practical Steps To Keep An Older PC Secure
Block Malicious Ads And Dangerous Sites System-Wide
The simplest way to shrink your attack surface is to stop threats before they load. A system-wide filter works across every browser and app on the PC, not just one browser. If you still have machines on the older OS, choose a tool that actually supports it, such as an ad blocker for Windows 7 that also runs on Windows 8, 10 and 11. It removes ads in browsers and desktop apps and warns you before you open known malicious websites. That's especially handy if you look after a mix of old and new computers, since one tool can cover all of them.
Enroll Your Windows 10 PCs In ESU
If you're on Windows 10, check that your PC runs version 22H2 and enroll in ESU through the Windows Update settings. Then keep automatic updates switched on so the remaining security patches actually arrive.
Keep Windows 7 Away From Sensitive Tasks
If you need Windows 7 for legacy software, treat that PC as a special-purpose machine. Don't use it for online banking, email or work accounts. If the software doesn't need the internet, disconnecting the PC entirely is the safest option.
Use A Supported Browser And Security Software
On Windows 10, any current browser will do. On Windows 7, stick with Firefox ESR 115 for as long as it keeps receiving updates. Also check that your antivirus vendor still supports your version of Windows and still delivers signature updates, because many have already ended Windows 7 support.
Stop Using An Administrator Account Every Day
Create a standard user account for daily work and use the admin account only for installing software or changing settings. If malware does slip through, it will have far fewer privileges to cause damage.
Back Up Regularly
Older systems are attractive targets for ransomware. Keep regular backups on an external drive that stays disconnected when not in use, or in a trusted cloud service, so a single infection can't wipe out your files.
Plan Your Upgrade Before The Deadline Plans It For You
All of these steps lower the risk, but none of them replaces real operating system updates. For Windows 10 users, October 2027 buys valuable time, so use it wisely. Run Microsoft's PC Health Check app to see whether your computer can move to Windows 11, and if it can't, start budgeting for a replacement now rather than in a rush next autumn.
For Windows 7, the clock has effectively run out already. If you depend on an old application, find out whether a newer version exists, whether it can run in a virtual machine on a modern PC, or whether a web-based alternative can replace it.
An older PC doesn't have to be an insecure one, but it does need more care than a brand-new machine. Windows 10 users have a clear path: enroll in ESU, keep updating and plan the move to Windows 11 before October 2027. Windows 7 users need tighter limits, from keeping the system away from sensitive tasks to relying on tools that still support it.
In both cases, the same basics make the biggest difference: filter malicious ads and dangerous sites, use a supported browser, avoid daily admin accounts and keep backups. Put them in place today, and your older PC can stay useful without becoming the weakest link in your digital life.