I Right click -> Change Ownership for "winsxs" folder but I am not able to delete it because it has many subfolders. It is a tedious job if I have to Right Click -> Change Ownership for each subfolder then delete it. This happens to other folders such as "System32" "SysWOW64" ... Any suggestions?
Any tutorial for Live Linux CD tip? Yes as you said I just need a method (it can be any) to delete/format unwanted system files in my hard disk.