Does anyone out there know why I cannot run the (My Dell option) on my OptiPlex GX280 or run the Dell Diagnostic's from the site on this desktop also. I reinstalled the (My Dell) option over 4 times now and it still will not work. I go to the support web-site and then run Dell Diagnostic for hours at a time and it does not get pass the installing option. I have Windows XP still as the operating system. I do not get any error messages so I have no idea what to do next. Thanks in advance from Don.