Booting up problem.
I'm new here, just joined. I'm having problems with my desktop computer. it will load up the Bios screen and then the scanning devices screen but from there the screen just goes black and goes no further. Whats more is, it shuts off quicker, just by simply pressing the power button, whereas I normally have to hold the button down for it to shut off. I'm not very knowledgeable when it comes to computers. Its a custom built computer, a few years old but has worked great up until now.
Any ideas as to what it may be? Any help would be much appreciated.