Computer won't auto repair. In continuous loop

Hi there. I'm trying to get an old computer going for my son so he can hook it up to an unused tv in his bedroom to use for internet and downloaded movies.
I'm trying to put windows 8.1 on this machine. It's 64 bit. Have bought all the hardware needed to get this thing to work, but it is in this continuous loop. All it does is boot from CD but when it tries to do that, there is a message about Auto repair which sits there for a few seconds then dissappears and shows some error codes which are too quick to read and then goes blue screen and restarts the whole thing again. So annoying. Can anybody help?