When you use backup, your account must be Administrator or Administrator level. To restore any backups, the RESTORER MUST BE USING THE SAME ACCOUNT AS WHEN THE BACKUPS WERE MADE...Now, your best bet would be to go to where the backup is located, right-clicking
on the icon,.choose properties. the security tab, you should be sure that your account name is listed, and that you have full control permissions. If not, you will have to add your account name into the list by selecting edit, and choosing add user, group
or security principle from (your machine name here) and clicking the advanced tab, then the find now button. THIS calls up a listing of all current and possible accounts, built-in, machine, and otherwise. select your username, click okay, and you will
be added to the permissions entries so that NOW YOU CAN SET YOUR PERMISSIONS! HIGHLIGHT YOUR NAME again, and click edit. click on full control, and click apply. IF THIS DOESN'T WORK, YOU WILL HAVE TO TRY TAKING OWNERSHIP OF THE FILE.