If you are simply not able to access your files then take the following steps to Take Ownership of a file or folder:
Right-click the file or folder for which you want to set permissions, click Properties, and then click the Security tab.
Click Advanced to open the Advanced Security Settings for dialog box.
Click Owner tab, click Edit. If you are prompted for an administrator password or confirmation, type your password or click Continue.
In the new Advanced Security Settings for box, in the Change owner to: field, select your User name, and Check the Replace owner on subcontainers and objects. Click OK, repeat for remaining boxes. (If your User name is not listed click the Other users or groups button to add your account).
Open the file or folder you wish to access.