Wifi router normally serves only one client

Question

Iron

There is a notorious Wi-Fi router Asus RT N16. It was bought 2.5 years ago, and at the same time DD-WRT firmware was installed on it. Everything was working fine, but recently I noticed that sometimes there is a problem with Wifi. Namely, when more than one computer is connected to the access point, the Internet on one of them starts to get terribly stupid, i.e. slows down a lot and sometimes doesn't work at all. It is worth sending a normally working computer to hibernation, the computer that slows down before that starts working normally. What could be the problem?
I have already reset the router twice, but it does not help. When rezet, I now have DD-WRT installed.

PS. In addition to two computers, there are two more Android phones on the network, but they seem to work fine and do not affect computers.

Answer 1

As an option, see what kind of traffic is coming from the computer.
We once had routers massively overloaded in the office. The reason turned out to be some kind of virus picked up, which flooded the network so much that the routers could not stand it.

Answer 2

It was similar.
It was decided by updating the wi-fi adapter driver on a computer that hangs the Internet to other users.

Answer 3

Asus rt-n16, firmware from Oleg. 1 year, flight is relatively normal. One side - on one of the laptops, the connection speed on the wafer jumps between 50 and 70 Mbps. But since my data plan doesn't reach those speeds, I don't really bother about it... yet. In general, two computers and one smart device for android do not interfere with each other at all.

Answer 4

Try updating DD-WRT. If the problem persists after updating DD-WRT, try flashing native firmware. If the problem remains on native firmware, then 90 percent of the problem is hardware.

Answer 5

Try setting WIFI to 802.11g only and remove 802.11b and 802.11n.
Leave only g.
Try it.