Canot Take Ownership Of Files?

Not sure if this is where this should go but I am having an issue with an old windows folder that is on my hard drive after doing a reinstall. Everytime I try to delete it it tells me I need permission to perform this action. That I require permission from xyz, which was my last computer name. I go to security and see that full control is set for adminstrators, So i go to advanced and take control of the folder.I go to delete the folder now, and it tells me still that I need permission to perform this action, You require permission from the administrator to make changes to this folder.Im confused since I am the adminstrator on the omputer, the only user. So i set full control and access to everything for every little user it had listed and still nothing. Not able to delete the folder. Personally I would rather not have to format my hard drive to solve this issue. Whats going on here and how do I fix it