9.3 System Lockup

I have a Acer Aspire 5002 laptop running SuSE 9.3. After the system starts up, it locks up right after the network or trying to access the disk. When I try to boot it in safe mode, it complains about the PCI hda, and about my memory and it just freezes there too. Is there something wrong with the new kernel? I have recently did a system upgrade. How do I revert back? TIA!