to run the Petya Vaccine you MUST
hit download (I would recommend saving it in your downloads folder, should be the default)
(WHILE IN FILE EXPLORER)
Right-click "Petya_Vaccine.bat"
Then hit "Run as Admin"
Click "yes" when promted
the Petya_Vaccine will scan to see if you have the vaccine or not
if you don't have it, it will then ask if you would like to intall the Petya_Vaccine
WARNING THIS MAKES A EDIT TO YOUR C:\WINDOWS FOLDER
then type "y" and hit enter
hit enter again to exit CMD
Keep in mind this is a VACCINE NOT A CURE!