Hi there! My name is***** am a computer professional with over 15 years of experience with both Mac and Windows. I'm sorry that you're having this issue. It would be my pleasure to help you resolve this. I'll need to ask a few questions in order to best assist you.
Have you ever been able to connect to the internet with this computer?
You mentioned that you had tried a different router. Can you describe your setup to me please. What type of internet service do you have? Dsl, cable, or something else? Do you have a modem provided by your internet service company? If so, what brand and model is it? Do you have a wifi router connected to the modem? What brand and model is the wifi router? When you switched routers were all of the other devices still connected?
With the original router, after making sure that other devices are in fact online, please connect an ethernet cable to the back of the router and to the ethernet port on the computer. Take a look at the back of the computer. Do you see any lights near the ethernet connection.? Are the yellow or green?
Do you think it might be possible that the wifi signal is not strong enough in the location that you have moved it to? If it is further away or or if there is steel, concrete, or even air-conditioning vents and returns between the new location and the router, that can have an impact impact on your Wi-Fi coverage. If you think this might be the case, you may want to consider using a wifi booster ( also known as a wifi repeater, or range extender) placed halfway between the router and the new location.
One possible way to test for this is to take the laptop to the same location and see how strong the connection is on the laptop.
Something else you might try is repositioning the router.
Please try this and let me know the results.
If you'd like I can connect to your laptop and then to your desktop to compare dns settings, etc. to see if they are the same and if not to make any needed changes. The symptoms that you are describing are indicative though of a weak or spotty connection. It is possible that the wifi adapter in the laptop is of a higher quality than the one in the desktop. If the desktop is on the floor you could try moving it a table and adjusting the antenna on the wireless adapter. Sometimes even small adjustments in the placement of the wifi receiver and the wifi transmitter (the router) can make a difference. The strength of a wifi signal can fluctuate due to interference from other electronic devices, or due to the number of other devices attached to the network. You might want to try running a speed test on both devices, the laptop and the desktop. That comparison will help you to see if there is a significant difference in the quality of the connection between the 2 devices, as a poor quality connection will produce lower connection speeds.
Connecting to the devices remotely and working on them while you watch would also allow me to see what adapter is present in each and see if there might be driver updates available for them that could help them to work better, or to recommend a different type of network adapter that might work better. Unfortunately that's about the only way I can think to investigate specifics. Otherwise I am limited to general recommendations. I can offer a SECURE REMOTE ASSISTANCE session at a discounted rate if that would help. It's normally $39. I can cut it in half to $19 if that would help.
If you'd prefer a second opinion rather than a SECURE REMOTE ASSISTANCE session please let me know and I will opt out so another expert can weigh in.
That is interesting that you have these issues even when it is connected to ethernet. That tells me that we should look at dns settings, gateway, etc on the laptop and replicate them on the desktop. We should also perform some general maintenance on the desktop to see if that might help. And perhaps check for driver updates for ethernet port as well as for wireless adapter.