The problem you are having is you don't have permissions to the folders you are trying to access since you have installed and are using a different operating system from the one you used to create the folders in the first place.
However, as long as you have administrative rights, you can gain access to anything you don't have access to. Right click on the folder, and choose properties, and then choose the security tab (if you don't see a security tab, boot into safe mode and you will be abel to see the security tab in that mode). Now click on the advanced button, add, and choose Administrators, and click Apply. Then click on Advanced, Find Now, and choose Everyone and click apply. Give everyone full control, and your in business.