|when i switch on my laptop my network icon has a yellow exclamation mark.|
Ok, this is the network interface on your laptop, not your router.
The exclamation mark means there's something wrong with your network interface. The first thing you'll want to try is updating the drivers for the device. If that doesn't fix the issue, you may need to un/reinstall it in Device Manager. If neither fixes it, you may have a problem with the hardware that will require having a qualified technician look at it. I suggest you check your warranty status on the unit before taking it in.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.