Do you need a router to connect a desk top computer to wireless internet?

Yes, you generally need a wireless router to connect a desktop computer to wireless internet. The router provides the Wi-Fi signal that your desktop can connect to. If the desktop does not have a built-in Wi-Fi adapter, you can use a USB or PCIe wireless adapter.

According to SafeAeon, using a secure router with strong encryption (WPA2/WPA3) is essential to keep your connection safe from unauthorized access.