Getting a lot of interference but roommate isn't

Hello Aguos.

The distance between your computer and the router is probably not the problem. Depending on the router's make and model there will be some limitations but 15 feet should not be one of them. The two walls certainly can be a problem depending on their construction and contents (e.g. wiring, pipes). And what is in the space between those two walls - is it a kitchen, bath, furnace, AC, laundry?

I doubt that your roomate's wireless adapter and mouse are causing the problem. Wireless mice/keyboards have weak signals and are on different frequencies/channels. My wireless mouse and keyboard start losing function at about 6 feet from the receiver.

You can look at the specifications for your wireless adapter but those are usually established under ideal circumstances. I would expect that the wireless adapter would not have any problems with 15' within most environments. Is your wireless adapter the same brand as the router? Should not matter if all is configured properly. However I have learned that most manufacturer's will quickly blame another manufacturer's product if there is a problem somewhere. I stay with one brand whenever possible.

My suggestions: (from easiest upward.....)

1 ) Try moving the router to another or preferably higher location. You may need longer cabling to do so but cables are fairly inexpensive if you need to purchase any.

2) Try moving your computer's wireless adapter to a higher location. Instead of attaching the USB wireless adapter directly to one of the computer's USB ports use a M-F USB extension cable to raise the adapter higher. Just a few feet can make a difference. Think in 3 dimensions - left and right may help as well. (I use a 10' USB extension for an upstairs system some 40+ feet away - being able to relocate the adapter higher greatly improved my wireless network performance.)

3) Borrow your roomate's wireless Adapter and see if that makes a difference. Or any other wireless adapter you can borrow for that matter.

4) This suggestion is a bit more complicated and mainly requires some deeper effort. First look for any other wireless networks nearby. You should be able to see any choices available provided they are broadcasting their SSID. Those networks could be causing the interference. You may need to select a different, less used, channel on the router. There are two or three freeware products available on the internet that can help identify competing networks and the channels they are using.

If the above suggestions do not work out please post what you were able to do and the corresponding results. Also include what router and wireless adapters you are using. There may be some configuration or firmware fluke or bug to be resolved.... I am sure that other's on this forum will have additional suggestions. Lots of good resources are available.

Good luck. Take care.