I reset my computer on the 3rd of November 2021 and I was still using my computer next to my router and there has been no trouble regarding ethernet connection at all. Recently, I have moved my router downstairs which is far from the router (which is upstairs) and since I needed a router that can use bandwidth control, I got the TP LINK WR-840N fairly recently, set the WR-840N as my main router and is now using my old router (TP LINK Archer C54) as a bridge and connected my computer to the bridge using an ethernet cable, everything had been going well so far up until 2 days ago where my computer would have major ping spikes shown in Discord VC and Games, and even would kick me out of the network, I cant even login to the WI-FI Connections. Thinking this was just another internet error, I restarted my routers but the problem kept persisting until I checked my internet on my phone while I was lagging on my computer. To my surprise, it turns out only my computer had this problem and every other connection in the house was fine. I have reset my Windows but the problem still persists, I can't afford to use the other router since QOS doesnt help much compared to Bandwidth Control, What should I do?