Hi nwarde,
You have been pretty "economical" with the details you have provided us with.
It would help us to help you if you provide us with as much information as possible, including the steps you have taken so far to solve the issue (we don't want to go over ground that you have already dealt with)
For example:
1 make and model number of your computer/
2 operating system, and service pack installed, 32bit or 64 bit?
3 speed you are buying from Talktalk and the actual speeds you are getting? (run the speed test and report back the figs)
4 Encryption being used? if so what type…WEP, WPA, WPA2 etc.,
5 What speeds do you get when using an ethernet cable rather than wireless?
6 what speeds do you get on wireless when your computer is only a few feet away from your WAP/Router
7 have you tried powering down both your WAP/router and then your computer and then powering up again… what was the results in terms of speed?
8 Is your WAP/router plugged into the BT master socket?
9 Are you using a microfilter (splitter) into your master socket and in each of any other telephone socket extensions you have in the property?
10 have you tried changing channel numbers?
11 Have your flushed the DNS cache?
12 Any DECT phones, Microwave devices, baby alarms or anything else working around 2.4GHz in the vicinity of your computer/WAP/router?
13 anything else nearby likely to attenuate the signal, metal articles, machinery thick walls etc
14 Have you tried a home plug network to see if this does the trick for you?
15 Have you spoken to Talktalk support?( they should be able to talk you through the basic checks) and can also initiate a line check to ensure that its not a line fault…( intermittent)
Give us as much information as possible and one of us will get back to you with the next steps
Regards
paws