If you think your computer has a virus, don’t panic. Slow performance, strange pop-ups, unknown programs or unexpected behavior can all be warning signs. The good news is that many infections can be removed with a careful, step-by-step approach. Follow this guide to deal with the problem safely.
Step 1: Disconnect the Computer From the Internet
Start by disconnecting the computer from the internet. This can prevent certain malicious programs from communicating with remote servers while you investigate the problem.
- Turn off Wi-Fi, or unplug the Ethernet cable if you suspect an active infection.
- Avoid logging in to any accounts until the computer is clean.
Then restart the computer into Safe Mode where possible. Safe Mode loads a more limited set of software and can make it easier to identify or remove malicious programs that normally start with Windows.
Step 2: Run a Full Security Scan
On Windows, open Windows Security and run a full scan. You can also use a reputable malware-removal tool for a second opinion.
Allow the scan to finish instead of canceling it halfway through. Large drives can take considerable time to scan, but interrupting the process may leave suspicious files unchecked.
Step 3: Use the Antivirus Removal Tool
If the security software finds malware, use the program’s built-in quarantine or removal process.
Do not manually delete suspicious system files simply because their names look unusual. Security software can identify relationships between files and processes that are not obvious to the average user, and deleting the wrong file can cause bigger problems.
Step 4: Change Your Important Passwords
If the infected computer was used for email, banking or other sensitive accounts, change those passwords from a clean device when possible, such as another computer or your phone.
Enable additional account security such as two-factor authentication wherever it is available. This gives your accounts extra protection even if a password has been exposed.
Step 5: Update Windows and Your Applications
After the infection has been dealt with, update Windows and all installed applications. Keeping software current reduces exposure to known security vulnerabilities.
How to Avoid Getting Infected Again
- Only download software from official websites and trusted stores.
- Be careful with email attachments and links you weren’t expecting.
- Keep automatic updates turned on.
- Keep your security software active.
- Back up important files regularly.
If the problem returns after scanning, or if your computer contains important business or personal data, consider asking a qualified technician for help. It is better to get support than to risk losing valuable files.
Disconnect, scan, remove, change your passwords and update your software. Taking each step in order gives you the best chance of clearing the problem safely and protecting your information afterward.
