1. Jiangmin Antivirus: I used it once in the computer lab, but it was really troublesome. It would pop up prompts whenever I ran any program. Because of this, I never touched it again afterwards.
2. Kaspersky: I must admit, Kaspersky has top-notch quality from virus scanning to monitoring. Personally, I think it doesn't slow down the system as much as people say. My 2006 computer still runs fine with it (the key is to set it up properly. Kaspersky updates frequently, which is one of its advantages (every 2~3 hours), so you must turn off the scan after updating, otherwise, imagine a scan every two hours, it's no wonder it slows down. Also, I set it to update once a day, so it doesn't affect my usage). However, because I often play games, I reluctantly decided to part ways with it. For classmates with good computer configurations, Kaspersky is definitely a great choice.