Do this either by clicking the Windows icon in the bottom-left corner of the screen, or by pressing the ⊞ Win key on your computer's keyboard. This button should be on the right side of the Start window, just below the Control Panel option. If you don't see this option, type devices and printers into the "Search" field at the bottom of the Start window, then click Devices and Printers. This link is in the top-left side of the Devices and Printers window. To do so, you must first locate the On/Off switch. Its location will vary depending on the keyboard, so look on the bottom, back, and sides of the keyboard.  If your keyboard uses batteries, you'll also need to make sure it has a fresh set before continuing. Many Bluetooth keyboards use built-in, rechargeable batteries instead of AAs or AAAs, so if your keyboard came with a charger, consider charging it for awhile before turning it on. After a few seconds, it should appear beneath the "Bluetooth" heading.  Your keyboard may have a pairing button that you must first press before it will show up in the Bluetooth menu. If you don't see your keyboard's name, your Windows 7 computer might not support Bluetooth. You can fix this by purchasing a Bluetooth adapter. It's in the bottom-right corner of the window. This process may take a few minutes. Once it completes, you should be able to use your wireless keyboard like a normal keyboard.

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Write a summary of the previous text in Chinese:
打开“开始”菜单。 点击设备和打印机。 点击添加设备。 打开键盘。 找到键盘名称。 点击下一步。 等待键盘完成连接。