Ahnlab is a well-known south Korea based Antivirus. It was established in 1995. Test results for its Paid Products https://www.av-test.org/en/antivirus/home-windows/manufacturer/ahnlab/ https://www.virusbulletin.com/testing/vendors/view_vendor_details/ahnlab It has a Free product AhnLab V3 Lite for long time but it has only recently been made available in English. Still the interface has some translation mistakes. https://www.ahnlab.com/kr/site/product/productView.do?prodSeq=8 Direct Download Link for English Version http://prod.ahnlab.com/v3lite/v40/download/V3Lite_Setup.exe Screenshot Gallery https://imgur.com/a/spInvIb I came to know about it from the MWTips thread. I installed it on two systems: Windows 7 ultimate 32 bit and Windows 10 Pro 64 bit and experiencing it for the last few days. I am impressed because 1. Clean interface. No advertisement of the pro version, No nags. It shows three features which it says are not available for my OS (PC Doctor, Parental Control & Credential Control). 2. Pretty light on my Windows 10. During scan also it doesn't make my system unusable. 3. Frequent updates. It gives nearly 10 updates per day. 4. It uploads unknown files to cloud for checking but does that gradually everyday. 5. Very much customizable. 6. On my system with 800 GB of data, it took nearly 8 hours to complete full scan but subsequent full scans take only around 18 minutes to complete! 7. Scans USB automatically upon insertion. 8. Doesn't require restart after install but recommends it to improve scan time. Still it has issues 1. There are quite a few inconsistencies in the GUI which will perhaps iron out in future program updates. 2. The free website is still not in English and no idea to contact developers and get updates. 3. Ransomware scan is still in beta. It gave me enough pain to update Burnware. It identified the program as new and scanned it for Ransomware and searched for info in its server. When everything came out as inconclusive/unknown it didn't let me install it but didn't gave me enough info. I finally managed to exclude it from Ransomware scan when it first pops up with an alert. Unfortunately the exclusion list for Ransomware didn't list that event although the program didn't alert me on that executable afterwards. I am using it in my system with Malwarebytes Premium and MCShield, and will keep it for a while.