Thanks for your reply and welcome.
The computer is about 5 years old, but had a new harddrive put in around 6 months ago. As for computer specifications, it says it is an AMD 64 Athlon on the front, but I can't tell you anymore than that unfortunately.
I tried to start it again, and it will start up and I was able to login to my user account. However, as that was loading up the computer froze, and an alarm noise started.