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.
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.
You should now see a window that shows all of your desktop icons, including the rkill.com program.
Double-click on the rkill.com in order to automatically attempt to stop any processes associated with the Rogue programs. Please be patient while the program looks for various malware programs and ends them. When it has finished, the black window will automatically close and you can continue with the next step.
If you get a message that rkill is an infection, do not be concerned. This message is just a fake warning given by the Horse when it terminates programs that may potentially remove it. If you run into these infections warnings that close Rkill, a trick is to leave the warning on the screen and then run Rkill again. By not closing the warning, this typically will allow you to bypass the malware trying to protect itself so that rkill can terminate the processes . So, please try running Rkill until malware is no longer running.
As a matter of a fact, if you get messages, it is a sign that the virus is agonizing with excrutiating pain, so you can just grin while it is suffering!:)))
Please, DO NOT REBOOT your computer or the processes will come back to haunt you!