I am running windows 7 home OS. The OS will not boot when I turn on the computer and it takes me to the system repair screen. Then it attempts to repair the errors, which are not stated and is unable to complete the task. The last step is to shutdown the computer. I tried booting into safe mode and it also will not work. It takes me back to the system repair screen. At the end of system repair the diagnosis and repair details state: "Startup repair has tried several times but still cannot determine the cause of the problem."