Go into the Bios and disable EIST and/or C1E, and turn off ACPI if you can.

Thanks Garry, but no luck yet.

YK, we are having the same issues with Mach.  We are running a brand new dual core pc with Windows 7 32 bit.  I wiped the hard drive and reloaded the OS.  There is nothing on the installation besides Mach.  When we run drivertest, it acts very erratic, almost random.  There is nothing running at system start-up, network connections are disabled, and options in the BIOS have been changed.  We are running Mach3 R3.043.022.  We have tried the SpecialDriver as well as the Vista Patch, to see if it would make any difference.  No such luck yet.