Howto connect bluetooth keyboard to non bluetooth pc?

I have a bluetooth keyboard that didn't come with a reciever. I want to connect it to my desktop pc, which doesn't have a bluetooth adapter.

Is there any way I can do it like by connecting it with bluetooth to my phone and then connect my phone and PC to the same Wifi, or something like that?

You need a USB Adapter for this application. Set up the USB adapter and then let it detect the Bluetooth Keyboard. I am quite sure you cannot use your phone to hook up the keyboard.

Here is a list of possible adapters for computers.

USB Bluetooth Adapters

What is a Bluetooth Adapter? Sometimes also called a “dongle,” a Bluetooth adapter is any device designed to connect to a PC, laptop, or mobile device and provide a Bluetooth connection service. Bluetooth adapters are often small USB plug-and-play devices with nothing more than an antenna for transmitting and receiving data and a few Bluetooth chips. Others are larger devices that sit on a desktop to provide connections to devices that aren’t wireless or give a boost to a connection’s range.

Consider this Adapter (there are many and this is an example. Also consider an Adapter from the manufacturer of the Keyboard.

Avantree DG40S USB Bluetooth 4.0 Adapter - Multi-Use Adapter

The DG40S is a multi-purpose Bluetooth adapter from Avantree that can be used with PCs, laptops, tablets, and smartphones.

It’s only compatible with Windows XP/Vista/7/8/10, and it’s designed to upgrade computers without a built-in Bluetooth capability.