Hi !

got a client with old 11G adsl router, which complained about disconnections of wifi and of internet. Replaced her with Tp-link 8951ND router TWICE, But it didn't preformed well - internet wise - and froze while trying to access it's WEB UI.
Talked to support - told me to replace to 8961ND model.
Changed the router, But then a wired computer responds slowly to the internet and on another router it responds well.
Bought a used router that was sold by her ISP D-link 2650U, And it works better, but now it cant recognize on one of the wired computers a networked HP printer, And she complains that wifi works slow on her ipad and her laptop pc.....
After 4 routers I don't really know what to do. I thought :
1. install the 8961ND again and replace the network card in the wired PC that worked slow with this router
2. Turn her 2650U Adsl router to modem and add another router as the dialer
Any other suggestions ?

Thank you