The My Security Shield virus is a deadly virus. It can use temporary files to track your internet browsing, stealing private and sensitive data that you enter on various websites. This makes it absolutely essential to remove.
I would say the best type of program to remove this virus is anti malware software, such as Malware Bytes. However, it appears that you have already used this type of software to not great avail. I would suggest, if you haven't already, to try Malwarebytes. If you have tried this and it did not work, you can read about how to remove this virus here: