Win 7 Home Premium 64 bit I have a Acer 5742G laptop ( UK version ), 14 months old, everything works save for one issue. Yesterday for the first time I decided to connect it to my router via WiFi. ( the laptop connects fine via cable or if I teather it via my mobile ). My router is a Huawei HG533 used in conjuction with my Talk-Talk sevice, I have no other wifi device connected or shared. When I try to connect laptop via wi-fi I get as far as imputing security password and a few seconds later one of two windows appear, either " security password mismatch " or the other message is "cannot connect,--trouble shoot, which tells me nothing.. Spoke to Talk-Talk, they checked router, ( security password ) all is OK, they seem convinced there is a problem with the internal wifi card on the laptop which they say maynot be compatable. The router is G/N rated and the interal wifi card is a B/G/N afair ( Atheros AR 5B97 ) according to ACER. I removed the laptop back cover the marking on the wifi card was T77H167.07HF I spent a while trying to resolve the issue, unistalling/installing latest drivers for the card,--- under device manger/network adapter/advance setting/Atheros/advanced, I disabled 802.11 bluetooth and enabled adhoc11n nothing doing. I read a forum that stated router speeds was running to fast and reset settings on wifi card to solve things ( don't know how to that ) another suggesting I reverse the two wires on the wifi card, I haven't tried that ). Bottom line is I can't connect my laptop via wifi, can any one suggest what the problem is and a fix.