Friend Dell 4600, CPU 3.G, RAM 1G, hard drive 80G, 30G free space, WinXP Pro SP3, freezes very often but not every time.
It boots completely normal, but have trouble on opening software such as Words, Outlook, FireFox. It has MaCfee Security which sometimes needs to manually verify subscription. The subscription is up to 2011. But the anit-spam filtering contents were reported not updated in last 7 days. The updating of this pack should be done automatically.
On using certain time, I hear a long beep from the motherboard and the computer freezes right away. But the beep does not necessary associate with every freezing.
I check the CPU and power fans, all are spinning. The mcshield.exe always occupies about 20% to 5% of CPU activity.
Any suggestions? Thanks.

