You guys amaze me with your helpful insight.
Dave M said:You're not alone there, I think that 64 bit download needs the further
clarification that it's not for the standard XP 32 bit installation in the
WD download pages as many people report making that same mistake. The
average computer user has no idea of what x64 even means, nor do they want
to dig through the fine print to find out:
From the main download page:
"To download the x64 version of Windows Defender, click here"
Then on the linked x64 page but buried in the verbiage and at the same font
"Please be sure to use WindowsDefenderX64.msi for 64-bit platforms."