Hi, I have a dell xps420 with vista Home Premium. Recently I needed to disable some services from runnig. So in Start menu, I right clicked on Computer and then selected Manage to get to the computer management section. However I get the following error message c:\Windows\system32\CompMgmt.msc Windows cannot access the specified device, file or path or file. You may not have the appropriate permissions to access the item. I have an administrator account so that is a problem. I have tried using system restore, but every time I try, on different restore points, System restore fails. Please help and I will greatly appreciate any.