Manually Remove the virus

Remove the virus manually:-

     Some virus can remove manually without any help of antivirus software, If the virus is affected to your computer, Just open the Task Manager using [ctrl+Alt+Del], You will see the task manager like below

If the CPU usage is 100% and it won't was constant, 98% you can consider computer is affected by virus, and then find which process is occupies the CPU usage like this, find under CPU. After find just right click on that process and simply press "End Process".

After did this, If you computer speed is increased, that file was virus or the file was affected by the virus, after end the process manually search where the file is located and remove it.