Matching files against a database of known spyware "fingerprints".

According to Lenovo , these tools defend against several types of "hidden" threats: What is Anti-spyware? - Nexus IN Groupe

Isolates infected files to prevent further damage and provides options to delete them permanently. Key Differences: Anti-Spyware vs. Antivirus

Identifying suspicious behaviors, such as a program trying to record keystrokes.

Performs deep scans of files and applications using:

Broad scanning for malicious code designed to damage or replicate. What it Protects You From