I have a Emachine T2642. Had to replace bad motherboard. Now I get an error when my machine tries to load up, takes me to a screen that says my machine was powered down unexpectedly. Gives me options of loading windows in safe mode, safe mode with networking, safe mode with command prompt, start with last know configuration or start windows normally. Any option that i choose gives me this error \windows\system32\config\system or it just reboots on me. I've tried to use the system disk that they give me to reinstall windows, and i still get the same error. What direction should i look in.