Check system for viruses

This is basically using to check incase if your system has infected any kind of viruses..


1- go to start-run-command
2- cd..  and press enter
   cd.. (again) and press enter
3-  cd windows and press enter
4- cd system32 and press enter
5- setup  and enter

Then you have to switch to the control panel to install components and systems composition
Then that means your pc is clean.
The idea here is the (setup)file which is located within (system32)is shut down when your pc infected and open when your pc is not infected because most viruses shut down all system.exe extensions.