I have Norton Systemworks 2009 Basic & Norton Internet Security 2009 installed on my computer. When I run Norton Disk Doctor in NSW, I sometimes get an error…Volume Bitmap is incorrect. When I click on Fix errors, Disk Check runs after I reboot my computer. However, the error eventually comes back again. I called support and they told me this has happened with others & not to worry about it. Is this correct? Is this a bug in NSW? My OS is Vista Home Premium, 64 bit. My computer does seem to be running fine, by the way.