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The first hour after a cyberattack matters. Quick action can limit the damage, protect your backups, and give investigators a better chance of finding out what happened. It is also an easy time to make a costly mistake. You might turn off the wrong computer, delete useful evidence, or send an email through an account the attacker can still read. You do not need deep technical knowledge to take the first steps. You need a clear order of action and the right phone numbers. This guide explains what to do during the first hour. It also covers where to report an attack in the United States, United Kingdom, and Australia. What Not to Do After a Cyberattack Pause before you start trying to fix the problem. A rushed action may destroy evidence or warn the attacker that you have found them. Do Not Turn Off the Affected Computer Disconnect the computer from the network instead, if you can. Unplug its network cable and turn off its Wi-Fi. Turning off a computer can remove evidence stored in its memory. That evidence may help your IT provider or an investigator learn how the attack happened. CISA advises businesses to isolate affected devices when possible. Shut down a device only when you cannot disconnect it from the network in another way. Do Not Delete or Clean Up Anything Leave ransom notes, strange emails, alerts, and unusual files where they are. Do not delete them or move them to the trash. Do not wipe the computer or reinstall its software. Your IT or incident response team may need the original evidence. You can take screenshots of what you see. Keep the original message or alert in place as well. Do Not Pay a Ransom Right Away A ransom note often creates fear and urgency.
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Microsoft stopped supporting Windows 10 on October 14, 2025. If your business still uses it, those computers no longer get standard security updates. The computers will still turn on. Your files and apps may still work. That makes the problem easy to ignore. Yet the risk grows each time someone finds a new flaw in Windows 10. Microsoft will not fix that flaw through normal updates. This can affect more than security. Unsupported software may cause issues with compliance, cyber insurance, and the apps your team uses each day. Your business has three main options. You can upgrade eligible computers to Windows 11 for free. You can buy Extended Security Updates as a short-term bridge. You can also replace computers that are too old to upgrade. Many businesses will need to use a mix of all three options. The right choice depends on each computer, its age, and the work it supports. What Windows 10 End of Support Means Microsoft ends support when a product reaches the end of its planned life. For Windows 10, that date was October 14, 2025. Microsoft has confirmed that Windows 10 no longer receives standard security fixes, quality updates, feature updates, or technical support. This does not make a Windows 10 computer fail at once. Nothing shuts down when support ends. The computer may seem no different from the day before. The key change happens behind the scenes. Microsoft no longer fixes new security flaws in Windows 10 through its normal update process. Attackers and security experts will keep finding flaws. On a supported system, Microsoft can release a patch to close the gap. On an unsupported Windows 10 computer, the gap may remain open. Each new flaw can give an attacker another possible route into the computer. The longer the computer stays unprotected,
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ee how a $14 credential purchase can lead to ransomware, and learn five practical controls that can stop an attack before it harms your small business