I just saw this post today. I haven't encountered the virus mentioned by the original poster. So I won't discuss it specifically. I'll just talk about my experience with antivirus and exchange with everyone. Also, please share your respective experiences.
First, talk about antivirus software.
Regarding which antivirus software is good, this has been a matter of debate. Some say AAA is the best and ZZZ is the worst, and vice versa. Some also say neither is good and XXX is the best. There are always several antivirus software that are relatively top in terms of the number of viruses detected, resource consumption, ease of use, etc. But my view is that the free ones are the best, and those with free updates are the best (including cracked versions).
Then talk about how to kill viruses.
Before talking about this, I always had an idea to say to everyone and even all in the IT industry: The current "virus" doesn't deserve to be called a virus and shouldn't be called a virus anymore. Why? Think about it. Originally, computer viruses borrowed the concept of biological viruses because their survival and behavior are extremely similar to biological viruses. First, it cannot exist alone and must be parasitic in normal files or the sectors used by the system, that is, it cannot exist as a single file. Because if it dared to exist as a single file, I could immediately delete it with "del"! So it must hide secretly.
In the Windows era, the situation is different. A virus can actually exist openly as one or several files! It dares to jump out! Why? This is caused by Windows! In DOS, there are not many places related to startup, and I can easily know where is abnormal. But in Windows, I thought I knew everything today, but one day I don't know where another place will pop up. Oh my god, I didn't expect this place is also related to startup?! In addition to the system's own startup, the startup of the resource manager and IE may all be used by viruses. And Microsoft has never clearly stated which files are related to the startup of the system and an application. I don't know if Microsoft's own engineers can make each item in the registry clear and explicit. Therefore, Windows itself is a huge place full of dirt! The current virus is precisely taking advantage of people's ignorance of system files so that it dares to exist as a file. Therefore, the current computer virus should not be called a virus, but should be called a bacterium, should be called a computer bacterium! (As far as I know, I am the first one to put forward this idea)
However, precisely because the current virus (let's call it by the habit for now) dares to exist as a file, it also enables us to remove it manually. I currently have only two types of viruses that cannot be removed manually in a virus-infected environment. One is 3721, and the other is a virus that replaces the most basic system files of Windows, that is, the system files that are also called in safe mode. The rest of the viruses can basically be manually deleted even in a virus-infected environment. Even if the virus files are not completely deleted, at least it can be made inactive, and then the antivirus software can be called to perform a full scan. The virus like smss.exe mentioned by sister afn, I have encountered it and it was removed manually.
Okay, let's stop talking big. If other people have any experiences and challenges, welcome to share and exchange.