Right-click the newly installed icon and select Printer properties . Under the General tab, click Print Test Page .

What connects the printer to the PC (USB, Serial, or LAN)? What POS software are you trying to link with the printer?

Before downloading, ensure you know if your computer is running a 32-bit or 64-bit version of Windows. 2. Download the Driver Package

The best source for the driver is the Sewoo official website ⁠Download Center

Supports Windows XP through Windows 10/11, including Server versions (32-bit & 64-bit). Look for the "THERMAL Receipt Printer Driver" (typically Ver 4.58 or higher for the T21 series).