Open Task Manager (Ctrl+Shift+Esc) while your attendance software is running. Go to tab. Look for the .exe name. If it has *32 next to it, it’s a 32-bit app. If not, it’s 64-bit.
A popup should appear: “DllRegisterServer in zkemkeeper.dll succeeded.” zkemkeeper.dll install 64 bit
If you are unable to find the 64-bit version of zkemkeeper.dll, you can try installing the 32-bit version on your 64-bit system. However, this method requires additional steps: it’s a 32-bit app. If not
If you only have the zkemkeeper.dll file, follow these steps carefully: zkemkeeper.dll install 64 bit
How to Install and Register zkemkeeper.dll on 64-bit Windows
Place ZKEMKeeper.dll inside: C:\Windows\SysWOW64