As regular readers of my posts will know, my sister has an ancient laptop. The wi-fi speed was a bit meh, so I twiddled the router settings. (2.4Ghz only):
- Enable 2.4Ghz is ticked (oddly enough)
- Wireless Mode is 802.11n
- 5Ghz is disabled as there's no need for it
- Enable Channel Optimization is ticked
Laptop setting are just set to just 802.11n and not b/g/n or g/n. (apart from a non negotiable setting)
This has more than doubled the wi-fi speed.
This may or may not work for you, but it's worth a try. Make a note of your settings then you can put it back to what it was, if this turns out to be total rubbish.
Cheers.