OK, all drivers and the BIOS updated successfully as far as I can tell. If you could, go to Start -> type devmgmt.msc -> enter -> under Network adapters give me the driver version number for Marvell Yukon 88E8040 PCI-E Fast Ethernet Controller, and under IDE ATA/ATAPI Controllers give me the driver version for Intel® ICH9M-E/M SATA AHCI Controller.
What specifically is slow? Everything? Can you describe the slowness in any way - is there just constant lag, hard drive thrashing, or something else?