### Comment:
What are some common signs or symptoms of a malware infection on a computer?

### REPLY:
When a computer is infected with malware, it can exhibit various symptoms such as keylogger capturing sensitive information like passwords and credit card details, creating backdoors for remote access, stealing personal data, or encrypting files and demanding ransom. Additionally, malware can also modify or delete files, log keystrokes, capture screenshots, or even turn on the computer's webcam and microphone without the user's knowledge or consent.