I have several HP/Compaq computers that are P4 2.4 Ghz with 512 meg of ram on the computers. The issue has to do with login. If I have a user that rebooted the computer and another user will login after that user the computer ask for the local workstation user name and password. I have tried this on my Dell computers and Brand new HP computer's and have no problems with them. Has any one come across this type of problem. This only happens on the S-510 and 530 models.