My desktop works fine but after about 10 minutes it freezes whether I'm listening to music, using Firefox, or running a program; sometimes when it freezes the tower beeps forcing me to reboot. I don't thinks it's heating issues, since the tower is so quiet. I maybe wrong.

Specs:

Microsoft Windows XP Professional
Version 2002
Service Package 3

Intel(R)
Pentium(R) 4
CPU 3.4GHz; 2.00 GB of RAM

Video Card: NVIDIA GeForce FX 5200