1. (Hint: Starts with 'v', 5 letters) is malware that spreads by infecting files.

2. (Hint: Starts with 'r', 10 letters) locks your files until you pay money.

3. A (Hint: Starts with 't', 6 letters) hides inside harmless-looking programs.

4. (Hint: Starts with 's', 7 letters) secretly watches what you do online.

5. (Hint: Starts with 'a', 6 letters) fills your screen with unwanted ads.

6. Never open email (Hint: Starts with 'a', 11 letters) from strangers.

7. (Hint: Starts with 'u', 6 letters) your software to fix security holes.

8. Use (Hint: Starts with 'a', 9 letters) software to catch malware.