Answer: That’s because the security removal tools are not human beings and they cannot catch all the new things. They need to update their functions from time to time to catch the newly released viruses. However, it seems that the infections’ creators know about this and they design all the related files of the viruses in random names. What’s worse, the pests can mutate at a fast speed. Thus, your antivirus cannot remove Yontoo.Pagerage completely. The most effective way to get rid of Yontoo.Pagerage is the manual removal. Here is a guide for you.
