@mauddib Have you tried changing the channel your modem uses for wifi? There will obviously be lots of wifi networks around since you live in an apartment and if you're sharing the same channel with lots of other people your performance will degrade.
Here's the first link I found.
http://www.howtogeek.com/197268/how...nnel-for-your-router-on-any-operating-system/
Here's the first link I found.
http://www.howtogeek.com/197268/how...nnel-for-your-router-on-any-operating-system/