how do I fix the wifi proximity on my laptop?

My guess is probably the antenna (which is usually a wire in around the display) is broken or become detached from the board.

It is like the second thing you take off when you open a laptop (most) but cracking the case and putting it back together is not usually easy.  So I would take it to a repair shop to see if that is the problem.

An easier way to debug it is to use a usb/wifi adapter.  They are really cheap, usually $30.  Get one that is 802.11ac.   If that one works, you can use it and forego your onboard.   If it bothers you, then you can fix it and stick the adapter in a drawer for the next time.

It depends on the type of WiFi you have, but one solution would be to switch over from the 2.4 GHz signal to the 5 GHz signal. Both your laptop and your router would have to support this feature at the same time. The 5 GHz band has some additional signal integrity features and is less prone to interference from other nearby WiFi routers. The downside is that it is less capable penetrating long distances than the 2.4 GHz one. However, it seems like distance isn't the problem here, but interference from the walls and floors and ceilings. 5 GHz won't travel as far, but it can usually travel better through the walls.

Alternately, there is a type of networking kit called a "powerline ethernet" which uses the power lines of your house to transmit data. This means that you don't have to go through the trouble of threading ethernet cable through your house, as it'll simply use your power grid itself as the network wiring. You would put one adapter near the router and connect it through ethernet. And then you would put the second adapter to your room, and attach your laptop through ethernet as well.

What happens if you take your laptop temporarily downstairs close to the router?  If the signal suddenly gets to top whack then the laptop is in perfect order.  The problem is the distance the WiFi signal has to travel to your room.

If the signal doesn’t improve then the problem is clearly in your laptop.

As others have suggested, using a ‘homeplug’ system to extend the Ethernet from the router to your room and connecting the unit in your room to the Ethernet port of your laptop will sort out either type of problem.

The suggestion of adding another router between the main one and your machine is not sensible.  If it is definitely the WiFi that is weak upstairs and you cannot use the Homeplug route then a WiFi Extender may be the only workable answer.

Judging from the distance, I suspect a weak signal between the wireless router and your laptop. I can think of a few options.

1. Bring the router closer to your bedroom. You'll to add more wiring from the mains (outside?) to pull the router further inside.

2. Attach another router to the existing router then set it up as a repeater or access point. Position the second router close to your bedroom, on the second floor corridor perhaps so everyone there can enjoy it. Again, more wiring.

3. On your laptop, use a USB WiFi adapter with a large antenna with a stronger signal. If your router has detachable antennas, get the same large antennas for it too. This will increase the signal strength between your laptop and the router. The main disadvantage here is you lose a USB slot on your laptop.

4. Get your own internet connection and install it inside your bedroom. Some internet providers supply wireless/broadband modems/routers that don't need wires. You connect wirelessly to the cellsite tower. Generally slower than fiber optics, most have limited monthly bandwidth and usually are more expensive..

Either the WiFi module has failed, or the antenna wires have come detached or broken. It needs dismantling and properly faultfinding / repairing.

PC is not a "make", sorry, it just means personal computer.

The simple work-around is to get some gigabit rated "homeplug" units. They pass Ethernet data through the house wiring; put one near the router and connect that by ethernet, then put another in your room and link that to your laptop.