[Marcantilan]

Hi,
Yesterday my computer started a strange behaviour. Shortly after windows loaded (when I opened the Internet Explorer), the computer just blacked out.
And, from the motherboard, started continuous beeps.

The computer didn´t reset (didn´t respond to the button) but the fans kept spinning.

I switched off and the (a minute later) on the computer, then loaded windows again. But shortly after, starting a problem, again frozes, blacked out and the beeps.

Then again, and again. Just minutes after windows loaded normally.

Notes: The disks seemed to "park" just after the froze. The fans kept spinning. The core and MB temperatura was no higher than 40º before and after the event. The MB is an Asrock K8 Upgrade and the CPU a Sempron 2800+ 64 bits (2 years old).

What do you think about it? What´s happening: faulty memory, CPU, PSU, motherboard, software related?

Your opinions? Thanks in advance!