Remove a virus without using antivirus for free

step1: Run the command prompt by going to start and type cmd on the search programs and files.
step2: Select the virus affected drive
                 (drivename: )C: D: E: F:(for example)
step3: type attrib -s -h *.* /s /d then press enter
step4: type dir
the dir command shows you the content of the drive
step5: check if there is an unusual .exe file
           if there's an autorun.inf file rename it(rename filename.extension newfilename )
step6: by doing the following steps you can now acces the drive without affecting the virus
Go to my computer and Select the drive
step7: Delete the harmful files
             *you can also delete the harmful files using command prompt
              ( type del filename)