To determine whether you're using a 32- or 64-bit version of Windows, simultaneously press the Windows and Pause keys on your keyboard.
Alternatively, click Start > Settings > System > About.
The displayed window will tell you whether your Windows version is 32- or 64-bit.

Right-click the appropriate file and save it to your Desktop.

• If your Windows version is 32-bit, use the register32.bat file.

• If your Windows version is 64-bit, use the register64.bat file.

At the prompt, press any key to continue.

When the process is finished, close the two open windows.

Restart your computer. You will be able to now successfully activate Payroll.