Fedora 6 strange hangs

[Al Graziano]

I hope some can help me as I am getting very frustrated.

I have recently update my Fedora 6 to the latest kernel etc. and I am 
now experiencing some very strange, apparently random behaviour

1) All of a sudden the system starts going very very slow until it 
eventually hangs and has to be rebooted with the laptop power button

2) Even when the system works and I do system reboot it shuts down 
everything but then it hangs and it doesn't reboot with the last two 
lines being

md: stopping all md devices
Restarting system

3) Every so often I hear some system beeps as triggered by some unknown 
events. Is there any way to find out what triggered those beeps as it 
may help me with 1) and 2)

I have read and read and I don't seem to find anything similar to my 
situation

I'd be grateful for any help/reading

Thanks
Al