Hi! Is it possible to change folder extension, to some of system extension, that the that folder can not be deleted or opened until the extension change to previous? Thanks!

Some extentions are forbiden to create in Windows due to system issue and protection.However you could use following command to make attribute of file as system :attrib [myfile] +sand the following to remove attribute:attrib [myfile] -smyfile is a folder that you want to change but before that you should use cd command to change directory to where you want