Try to restore to an earlier time and see if that clears the issue up. If not, this KB explains how to perform your various options.
http://windows.microsoft.com/en-us/windows-8/restore-refresh-reset-pc
Try to restore to an earlier time and see if that clears the issue up. If not, this KB explains how to perform your various options.
http://windows.microsoft.com/en-us/windows-8/restore-refresh-reset-pc