routor head akes

I have bin looking for a new wierless g routor for a wile now because the old one I have was not working quite right. yesterday my mom saw one on saile at future shop, but it was only available wile supplys lasted. So I went there and being one of the first people to enter the stor i got one and brot it home. i got it all hooked up and followed all the steps to set it all up. Everything went fign untill I went to save the changes. at that point i got a page cant be displayed message, and lost internet access as well as access to the routor. I tryed re setting the routor a number of times but although my computer would show it was connected to the routor, i still could not access the routor or get online. i tryed it on a different computer and went through the steps of setting everything right again. After all that it stopped working again . However this time it showed the furmware up date page instead of the log on screen. At this point i called up tech support and told them what was going on. they told me i had to go and downloade a furmware update from the d link support site, however since i did not have internet access through it i had to un plug from the routor and plug it into the modem and move it back again once i had the update. but when I did that and plugd back into the routor i could no longer access the routor so i was not able to install the update. At this point i decided to bring it back to future shop and see if i could get it exchanged. when i brot it back i fould they were non left so i decided to keep it tell they got more in. however once i got it home again i tryed it again and i got into the routor was able to install the update, and its bin working fign ever since. I hope it continues to work!