I have a Dell E6450 with Windows 7 pro. I need it for some old business software that won't run on anything newer. I booted up today to do some work and I couldn't get to a desktop. It booted to safe mode ok and I tried a system restore which did not work. It had previously done the same thing a couple days ago but system restore fixed the problem. Now I can't boot to safe mood. I can press F8 and get to system repair ok. I tried system repair that didn't work. I did system restore from the menu and it restarts and windows starts to load and then the computer just powers off. Any suggestions? I'm wondering if it's software or hardware. The laptop is old and things do fail. Problem with the hard drive maybe. The system repair tools load fine. I just replaced the battery.