You need to restart your computer and as soon as it boots before any programs load on the start up open the task manager and go to the processes tab and end that making note of them name. (viruses like this are normally random letters and numbers) Search your computer for it using the nifty search companion making sure to include hidden and system files and delete it. Before deleting anything make sure you are looking at the correct everything. If you are unsure of it message me on here and I can identify the process you are looking at. Whether it be system, a program or a virus.