i have had my dell xps 1645 for around a year now i bought it off a website second hand last night it just shut down now when i turn it on all i get is a flashing mute light and the volume up and down are solid lights.

I just replaced a hard drive in a Dell 8300 and I'm getting ready to reinstall windows 7 back in. I also need to reset the administrators password. My sister-in-law has no idea what the old password is. I'm not sure how to change the password. Help Please

My AlienWare 51 continues to reboot after being logged into the OS for 5 minutes. I purshased a new PSU, a new MotherBoard(same model as the one that comes with the X51) I puled each Graphic Card one at a time, same with the RAM. I even re-installed the OS.