### Comment:
What are some signs that indicate a system is infected with malware?

### REPLY:
A system infected with malware may exhibit various signs, such as the sudden appearance of explicit or offensive content on the screen, unauthorized access to personal files and folders, or the encryption of files with a ransom demand. These signs can indicate the presence of advanced malware that aims to extort money or steal sensitive information. It is crucial to contact a professional cybersecurity expert immediately to mitigate the damage and prevent further compromise.