When I access my music files I can always go to properties and change the Artist names, Album name, Genre and etc without any hassles. But there are some songs that won't let me to do that via properties and there I have a folder called 'various artists' that has those songs without an Artist name. How do I fix this?

Right click on one trying to change and make sure that the 'Read-Only' box is not checked, if it is, uncheck and click apply and try again

This can be solved in four easy steps:

1) right click on your song
2) choose 'Advanced Tag Editor'
3) choose 'Artist Infor' tab
4) change 'Album Artist' field

Hope this was helpful :)