One kind of father which is included in windows operating system called autorun. It runs any application or program automatically that domiciles on a USB Flash player drive or CD or DVD drive as shortly it's entered into the system. So the drivers are open quickly. As a result any when the drive removes and if any junk file or Virus and malware are included into the CD or DVD or other USB external drive, automatically run that unexpected file (Virus, Trojan etc.) attract your PC and you can lose your data by the third party. Also you can face various internal problem such as PC slow, PC hangup etc.
We can easily protect our PC from attracting virus, malware or trojan that are through by autorun.
At first we can stop automatically setup autorun. Via update windows autorun can disable.
It is important for us that we shall disable autorun of our PC for the safety. If our PC are infected we should update our program from the Microsoft support center or we can use a better anti virus software and anti virus removal software.