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

### REPLY:
One sign of a malware infection is the presence of a keylogger, which records every keystroke made on the infected computer. This can include sensitive information such as passwords, credit card numbers, and personal identification information. Another indication is the presence of a backdoor, which allows remote access to the infected system, enabling the attacker to steal confidential data or launch further attacks. Additionally, some malware may encrypt files and demand a ransom for their release, a technique known as ransomware.