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After connecting to access point away from home, laptop no longer will connect to home access point

This problem seems to occur once in a while, and I have never known what has caused it or what the solution is.

After taking my laptop to connect at some access point away from home, it will no longer connect to my access point at home when I return. What might cause this and what might the solution be?
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jasimon9
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Additional info: it seems to get stuck on "acquiring network address." This is strange because the system usually will connect immediately upon bootup.
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Lot's of good ideas. I will try the flushdns, release, renew (things I have done in the past, but forgot about).

I have tried rebooting several times, and that made no difference.

My home network has a unqiue name that is not duplicated on other routers.

The "delete-recreate" is also a good idea.

I'll let you know my results.
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Immediately after posting my last comment on 10/24, my laptop back light went out and I had to take it in for repair. So I have not yet been able to try the above suggestions. Will post again when I get the machine back.
Four way split would be fair...
dido with dragon-it
Don't let my wife see that comment... just 'cos I had one Dido CD she thinks I fancy her
We did get the laptop back and have not had the situation recur since then.

I have many times moved my own network to the top, and it does not help. However, the flushdns is probably the correct approach. After sometime the dns would usually time out and take care of itself, but moving between many connections in a short time would seem to solved by the flushdns and I believe in the past that is what worked for me.

Therefore I believe that that is the correct solution. However, deleting the network and letting it be found again would also seem to be a likely solution. So I am going to split points on this basis.