they probably do, I haven't looked. I thought it was on here, but the thing on here covers everything but antivirus.
Looking now they don't list 8 on the MSE site, just up to 7. I'm downloading the version for 7 (64 bit) to try because everything for 7 works fine.
EDIT:
MSE says I don't need it. But yet WD keeps advising me to install antivirus software....