System halted instead shut down

[Mohan Jayaweera]

 Greetings to the list!
This is the first time I am writing to this list

my problem is, my Intel mechine stops powered on leaving this(below) mesg
when I shut it down. I am running Fedora 7, yum updated more than 584Ms
after the installation yesterday.
---------------------------------------------------------------
ACPI: PCI interrupt for device 0000.07.8.0
System halted
---------------------------------------------------------------
is there any remedy for this matter
thanks in advance
Mohan
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