Without more information, I cannot be sure. If you are using Vista or Windows 7, you may need to run Eraser as Administrator. Use the link in my signature to go to the FAQ, and read the sticky post on common Eraser problems.
I have the same problem even though I am running as an administrator on my personal notebook.
Session: Sunday, 18 July, 2010 10:29:46 AM
Sunday, 18 July, 2010 10:29:46 AM Error The program does not have the required permissions to erase the unused space on disk. Run the program as an administrator and retry the operation.
Hi David. I appreciate your generosity with your time. I tried running eraser as administrator to no avail. When I click run now I almost immediately get the message completed with errors under status. Under next run it says not queued. I am puzzled; if I try to erase a single file it seems to work just fine. The only time I encounter this problem is when I try to erase the unused disk space on drive C.
I am having the same issue. I just did a fresh install of Vista on a notebook I intend to sell. I set it to erase all free disk space and got the same message.
The message occurs immediately upon starting the task and all it says is that the program does not have the required permissions. I rebooted and ran as administrator just to check that and got the same error.
Session: Monday, August 16, 2010 2:23:22 PM
Monday, August 16, 2010 2:23:22 PM Error The program does not have the required permissions to erase the unused space on disk. Run the program as an administrator and retry the operation.
Still doesn't work even when I run it was an administrator
I had the same problem. I closed Eraser. I ran it as Admin. Still, not the correct permissions.
I then checked the system tray and saw that it had just been minimized, not closed. I then exited it from the system tray and ran it as Admin. Then it worked.
I'm logged on as an administrator, using Windows 7 Home Premium. Whatever I try to erase I get errors of the type: ....could not be erased because the file's permissions prevent access to the file.
Now I know what this should mean, but seeing as I'm admin and I can do anything I like with the files in question, I'm at a loss to understand what the problem is. I have exactly the same promlem when running Eraser on the Recycle Bin.