The error "Class not registered" usually means that the system is missing a required COM component. For ZKTeco attendance software, this typically refers to a missing or unregistered ZKEMKeeper.dll file.

### ✅ Here's how to fix it:

#### 1. Download the file:

You can safely download ZKEMKeeper.dll from trusted sources such as:

https://www.dll-files.com/zkemkeeper.dll.html

\> Be sure to scan the file before use.

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#### 2. Copy it to the system folder:

- For *64-bit Windows*: C:\Windows\SysWOW64

- For *32-bit Windows*: C:\Windows\System32

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#### 3. Register the DLL:

Open *Command Prompt as Administrator*, and run: