I thought all newer Maxtor drivers come with that in a CD form now too? At least mine did. In any case, you should be able to go to Maxtor's website and download it from there and get something working. They have a PowerMax 4.21 Bootable ISO image ready and available if you need only that program. Try this
LINK HERE. That link may or may not work, so if not, just browse the support section of their website for the Support Downloads and go to ATA Diagnostics and choose PowerMax...

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The
Ultimate Boot CD 4 Windows - Kinda like the UBCD, but not...