4 laptops are blind, but iOS devices can still conect

I am having an issue that has me just perplexed. Last Thursday we awoke to our laptops not connecting to the wireless network anymore. Figured it was a router or modem issue, but all 4 laptops (1 Asus G51vx, 2 Asus K43, 1 HP)were not able to see any wireless access points. Thought maybe windows update had gone horribly wrong, but all laptops connected without problem when away from the house. We get back, no wireless access points. During the time we were at the house, 2 iPhones and 1 iPad were connecting without an issue. Router was a Linksys e3000, and decided to try replacing it with a Netgear N750 dual band, but experienced the same results. I am truly stumped and honestly not sure what the next step is. Even reloaded two laptops to see if they would have an issue after factory restore, but no dice. Yet, walk around the block with these same laptops and they are just fine. This isn't something that I have ever experienced, not can I really find anything similar when searching the web. Does anyone have an idea of what I am looking at, much less how to resolve? Thank you in advance for any help you can give me.

I forgot to state that two are windows 7, 1 is Vista 64bit, and 1 is XP

 

Both are dual band routers- are you sure that laptops are trying to connect to the same band that iDevices are?
Following that- try to change wireless channel used by the router.