The same problem happened to me as well. Try this
1.In Windows Explorer, click Tools, then click Folder Options.
2.On the View tab, in the Advanced Settings area, click to clear the Use Simple File Sharing (Recommended) check box.
then right click on folder and ur folders properties, go to security tab.
then click [add] then click [advanced] then click [Find Now] then a list will come out, then find ur username or Administrator. add it.
then you'll go backto the previous page, then check [full control].
then apply, then ok.
now this shud fix ur problem