|Setting up a network cable connection is easy - setting up a wireless network connection is NOT, unless you know what you're doing. |
You need to tell us a lot more.
What is the make and model of your brand name computer, or if you have a generic desktop system, what is the make and model of the mboard ?
If it's a laptop or netbook, does it have a built in wireless network adapter ? Older models did not come with one.
If it's a desktop computer, it probably didn't come with a wireless network adapter.
In any case, if the computer didn't come with a wireless adapter, we need to know the make and model. of the wireless adapter you're using.
Have you EVER gotten the wireless connection to work previously ?
What are you trying to connect between wirelessly ?
A wireless adapter and a wireless router, or a wireless adapter and another wireless adapter on another computer ?
The former requires you use Infrastructure mode in the router's configuration; the latter requires that you use AdHoc mode for both wireless adapters in Windows.
The proper drivers must have been installed in Windows for the wireless adapter and it must be shown that it is working correctly in Device Manager.
If either end or both ends of the wireless connection is using Security settings - an encryption code or password - the security settings on both ends must be compatible with each other.
If those settings are not correct for the connection to work wirelessly, you must change the Security settings on at least one end of the to-be wireless connection to make the settings compatible.
E.g. if you're trying to connect wirelessly from a wireless adapter on a computer to a wireless router, if you can't connect to the router wirelessly, you could connect to the router via a network cable connection from a wired network adapter on the same computer to a network port on the router , then access the router via it's URL - 192.168.xxx.xxx in an internet browser such as IE, - then use the user name and password for the router's configuration settings to access them and copy down the SSID label (the name that is broadcast by the router), and the encryption code or password used in the security settings..
The default URL, user name and password to access it's configuration settings, are in the router model's manual.
Once you know the Security Code or Password, you can use Windows' built in Wireless Zero utility to search for available wireless connections (on the computer that has the wireless network adapter), choose the one that has the SSID label of your router, click on Connect, then supply the Security code or password you got from the router's configuration.
NOTE that if you have NOT set up a wireless connection to the wireless router before, or if you have but you have loaded default settings for the router, the wireless features of the wireless router (broadcast) may be switched OFF (disabled) by default - in that case you have to access the router's configuration via a network cable connection to switch that to ON (enabled), save settings, and you may need to also set up the Security settings for the wireless connection in the router's configuration - see the router model's manual, Save setiings.