OK, everyone, here's hopefully an easy problem for all you really smart people out there in this forum. I have been pulling my hair out on this one and tried everything I know to try. I have an Acer Aspire X1200 with Vista home premium running on it. It developed a problem where it will not completely boot up. It appears like it is, but it goes to a screen after it goes through the BIOS and splash screen, that has the user name in it at the bottom part of it with shut down options to the right of it. When I click on the user name in the box, a message comes up on the screen that says shutting down, so it shuts down and tries to restart and does the same thing again. I have installed the drive in another computer as a secondary drive and have run malwarebytes, avg, and other error checking software on it and nothing checks bad on the drive. By the way, it will boot up in the safe mode. What's up. Thanks for any help.