The term "WUB x64" specifically refers to the 64-bit compiled version of Windows Update Blocker. While the standard release runs fine on x64 systems, enthusiasts and technicians seek out the native x64 variant for three critical reasons:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU and create a DWORD (32-bit) NoAutoUpdate with a value of Security Warning wub x64
No installation. No background processes. Just pure control. The term "WUB x64" specifically refers to the