When I have run into this problem before, I was always able to go take ownership of the folder/file and then change the security. However, with this folder, I don't have a security tab available to me. When I select properties for the folder, the only tabs are general and customize.
How do I get access to this folder?
Try to take permission with System permissions
at 20:09 /interactive cmd.exe
20:09 is time when scheduled task should run. Set it to about 1 minute more then current time and press enter to set it off... Wait about a minute and new cmd.exe will show up. Note: this will only work from console and not from e.g. Terminal Services -- so you can not use RDP connection to the server.
When new console window opens (in about a minute) enter this in it: