Wireless not working after I got a new technicolor thomson 799 v2 gateway router

[user1]

> Main reason is that my broadband speed was becoming VERY slow aprox 0.4
> Mbit/s which it was not in the beginning) In the beginning I compared
> TG784 and 799 on 2 different computers and the speed was high on both.
> Then i found out that wireless was not working and I used ethernet cable
> and it worked and then speed began shifting on my primary laptop (HP
> dv9000).
> It has been a long termed process and I talked to my ISP several times
> and got no explanation - and on "Google" I found no answer - only that
> the router design might be too new and have no proper driver.
> I began suspecting it was my ethernet cable but it was not.
> Sorry!

I got this link from my ISP (in Swedish)

Press and hold the reset button for 10 seconds - should help many 
problems they say.

http://www.telia.se/privat/support/info/fabriksaterstall-tradlos-router