I have 2 SP4s. One is an M3 and the other an i5. I want to be able to restart both SP4s without a password. Based on an Internet search, I ran netplwiz.exe and unchecked the box that says "Users must enter a user name and password to use this computer." This fix worked on one SP4 but not the other. More Internet searching found that, if the above remedy doesn't work, there's a registry edit that I can try. I'm very hesitant to do registry edits and will only do so as a last resort. Why does the above fix work on one SP4 but not the other? The only difference I can think of is the SP4 that's still prompting me for a password on restart has a user name (in addition to my email address for my MS account) while the SP4 that restarts without a password doesn't have a user name.