How to Protect Against Ransomware Online

Set up protections on your computer to prevent ransomware from locking your files and demanding payment.

Steps

1
Keep your operating system and software updated.
Turn on automatic updates for Windows or Mac so security patches install as soon as they are ready.
2
Install and run trusted antivirus software.
Use Windows Security or a well-known antivirus program with ransomware protection features turned on.
3
Enable controlled folder access on Windows.
Search for "Ransomware Protection" in Windows settings and turn on "Controlled Folder Access" to block unauthorized changes.
4
Set up automatic backups to the cloud or an external drive.
Regular backups mean you can restore your files without paying a ransom if you get infected.
5
Do not open email attachments or click links from unknown senders.
Ransomware often arrives through phishing emails that look like they come from real companies.

How does ransomware get on my computer?Show

Ransomware usually arrives through phishing emails, fake software downloads, or malicious ads on websites you visit.

Can ransomware infect my phone?Show

Yes, ransomware can target Android and iPhone users through malicious apps and fake browser alerts. Stick to official app stores.

What should I do if I get a ransomware message?Show

Disconnect your computer from the internet and do not pay the ransom. Run a full antivirus scan and restore your files from backup.

Written by the HowToDoStuff.online editorial team. Last updated May 18, 2026.