Everytime I open my Macbook I have to go into network etc to get my WiFi can anyone help as to why it won't keep the wifi set

Howdy bandb39,

If your Mac isn't automatically connecting to your Wi-Fi network the steps below can help restore its ability to do so. If you're not running OS X Lion or earlier, the steps are still applicable.

Use these steps if your computer does not automatically connect to your desired Wi-Fi network.

1. Check your TCP/IP settings in the Network pane of the System Preferences. Click the "Renew DHCP lease" button
   1. Choose System Preferences from the Apple menu.
   2. Choose Network from the View menu.
   3. Select Wi-Fi, then click the Advanced button in the lower-left hand corner of the screen.
   4. Click the TCP/IP tab from the top of the screen.
   5. Click the "Renew DHCP lease" button.

      

2. Select the Wi-Fi tab and view your Preferred Networks list.
   1. Select each network and click the minus (-) sign to remove those networks from your Preferred Networks list.
   2. Click OK and close the Network preferences.

      

3. Remove your stored network passwords using the Keychain Access Utility.
   1. Open Keychain Access from /Applications/Utilities. Your window will look like this:

      

   2. Remove your AirPort network passwords from the login keychain: Select the "login" keychain from the Keychain sidebar. Click the "Kind" column to order the list of keychain items by their type. Remove all entries of the kind: "AirPort network password".
   3. Remove your AirPort network passwords from the System keychain: Select the "System" keychain from the Keychain sidebar. Click the "Kind" column to order the list of keychain items by their type. Remove all entries of the kind: "AirPort network password".

      Note: The above steps will remove your Wi-Fi network passwords. If you do not know them, or if your network does not use passwords to restrict access, you should contact your network administrator.

4. Restart your computer.
5. Join your Wi-Fi network. You will need to enter your password for your network again if it requires one.

How to troubleshoot Wi-Fi connectivity in OS X Lion or earlier
https://support.apple.com/en-us/HT202222

Cheers!