Windows 7: my computer stopped connecting to my router

My wireless adapter shows that it is connected to my network, but my computer cannot connect to the internet. All other computers can still connect to the internet. It worked fine for almost a year, then one day...no connection.
I use Windows 7, Home Premium, 64-bit; engenius wireless adapter and Linksys router. I tried to change to a TP-Link router, but my adapter (or computer) couldn't find it, so I switched back to the Linksys.
Tried re-installing wireless adapter, linksys, tp-link; re-sets to both routers; uninstalling software, then re-installing;
Any solutions I've missed?

I forgot to include the error message. I don't know what it means:
"Windows couldn't automatically bind the IP protocol stack to the network adapter."
Hope that helps solve my mystery.

Hey there, welcome to the forums. While we wait for the experts to weigh in, perhaps you may find some useful information in similar threads:

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Solved: Help! Windows couldn't bind IP protocol stack to the network adaptor - Tech Support Guy Forums

Got those from looking up the error you posted (good thing you did that, it helps a lot). Good luck.

Welcome to the Seven Forums.

Check out at Windows couldn't automatically bind the IP protocol stack to the - Microsoft Answers and please tell us if the suggestions there helped you in sorting out your problem.

Reinstalling the NIC driver might work as the other suggested. If that doesn't work can you please post a screen shot of your ipconfig/all here for me please.

You just need to type ipconfig/all into an elevated command prompt.