How did you try changing the permissions if the folder offers no response to any type of user actions?
And when you say you tried the copy command suggested by Shadethire
in post #7, could you be more specific about the results. Did it report anything after pressing enter? or what?
First I'd recommend using and elevated command prompt and try to enter the directory. If this does not prove helpful, try using the short-style filenames (e.g. mymusicfolder = "mymuci~1" etc.) to see what it reports back or if it allows access to the folder this way.
Addition: What type of antivirus software are you using for active protection? Have you ever uninstalled
any previously installed antivirus/antimalware software you used to have installed?