Issue

My computer has a virus that is preventing me from accessing the internet. When I try to do so a warning comes up from a fake virus protection software saying "Warning message from your Internet browser. This page is under virus attack. This may crash your system." From what I can gather, the program is called Security Shield and has added a red cross shield and green shield to the taskbar in the bottom right-hand corner.

Solution

You have a rogue virus Trojan Horse which is self protective, thus it will prevent any antivirus from fonctionning.

You must kill the evil processes which the virus is presently running amd preventing you from running any antivirus. If you don't it will keep reproducing the files for ever.

To kill the processes:

First boot in safemode with networking you should then be able to access Internet.