How to better protect your PC with botnet protection and avoid malware
What is a botnet?
How to tell if your computer is infected with malware
- Get a more complete list of symptoms.
- If, based on the complete list of symptoms, you think your computer has been infected, let Microsoft help you diagnose the problem and solve it.
How to help avoid malware
- They install malware on a computer by taking advantage of unintended vulnerabilities in its software or by breaking into accounts guarded by weak passwords.
- They try to trick you into installing their malware.
Strengthen your computer's defenses
- Install antivirus and antispyware programs from a trusted source. Anti-malware programs scan and monitor your computer for known viruses and spyware. When they find something, they warn you and help you take action.
- Keep all software up to date. Regularly install updates for all your software and subscribe to automatic updates wherever possible.
- Use strong passwords and keep them secret. Use our password checker to determine the strength of your password.
- Never turn off your firewall. A firewall puts a protective barrier between your computer and the Internet. Turning it off for even a minute increases the risk that your PC will be infected with malware.
- Use flash drives cautiously. Putting your flash drive (sometimes called a thumb drive) in a computer that is infected could corrupt the drive, and ultimately your computer.
Do not be tricked into downloading malware
- Delivering malware in downloads that you think are pictures or movies, or through links that you click in email or instant messages (IM), or on a social network.
- Scaring you into clicking a button or link they supply with fake warnings that your computer has a virus.