Since "KP206" is a common model number used by several manufacturers (like Shreyans or various generic POS brands), your first stop should be the website of the company you bought it from.
Thermal Receipt Printers: Printer Driver (v4.51) - Wasp Helpdesk thermal receipt printer kp206bub driver upd
To complete a clean driver update on Windows, you must flush out previous legacy device interfaces to prevent port allocation conflicts. Thermal Receipt Printer Driver - POS-X Since "KP206" is a common model number used
If you have the installation CD but it is not working, the driver folder on the CD often contains the chipset drivers for main boards or peripherals that you can manually install. If you have followed the entire guide and
If you have followed the entire guide and your printer still refuses to work, contact the reseller or 2‑connet technical support directly. Provide them with your Windows version, the exact model number (KP206BUB), and a description of the symptoms. In most cases, they can supply the correct driver or additional troubleshooting steps.