how to Stop comupter for installing harmful .exe file

Stop comupter for installing harmful .exe file
How to stop your computer for installing .exe files directly when you open it there is security method so that you can stop auto installing .exe files in your computer which is very harmful

Methods :
go to run from start menu
type gpedit.msc
go to local computer policy
click on windows setting
click on security setting
click on software restriction policy
click on additional rules
right click on page
click on new path rule
then dialogue box will appear for New Path Rule
in Path Box type A:\
and in security level click disallowed
and click ok
continue in path box and type B:\ to Z:\ accordingly
DON’T PUT    C:\  because c is your existing drive