A search of the forums seems to indicate that "portcls.sys" is related to your system's audio. One suggestion...... if your using the integrated sound on the motherboard then I would try disabling it in the BIOS so that the Windows installation could continue. After Windows is installed you could then re-enable it in the BIOS and deal with the driver issue then. On your model the Sound option is found under the Integrated Devices heading of the BIOS Setup.
