Wireless Issue on Dell Laptop

I have a client with a Dell Studio laptop running Windows 7.
They also have 2 other mac books and an ipod that connects to their new wireless modem in the house.

All other devices work fine, including PC connected via cable, however the Dell laptop is not consistent with its connections.

i have been there twice and both times the dell laptop has connected OK to the wireless network, however at different times of the day, it will lose the network and be unable to find it or connect ot it.
Even a restart of the laptop does not help.
After leaving it for the day then starting again the next day it will all of a sudden find the wireless network and connect to it.

I have checked wireless drivers, wireless networks set-up in Networking and sharing center and disconnected and re-connected the wireless with the correct password to the wireless network numerous times.

The only thing I can think is that the wireless card in the laptop is faulty.

We very recently replaced the wireless modem in their house.  I think the wireless on the laptop played up once or twice previously, but after the new modem has gone in it plays up frequently.

As other devices are connecting fine, I do not think it is the wireless modem

Any thoughts?
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JohnBusiness Consultant (Owner)Commented:
Try the following: In all available places (Device Manager, Windows Power Manager, 3rd party Power Manager, 3rd party Wireless Manager) make sure the wireless card is set to Maximum Performance (and not Maximum Power Savings).

Normally, if this is an issue, a restart will fix it until the next power save cycle. So try it, and if not, then my next step would agree with yours - try a new card. ... Thinkpads_User

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ok try creating an ad-hoc on this PC and connect any other device to it ... see whether its connecting or not ... if it doesn't try connecting it first to any other ad-hoc connection then disconnect and connect it to your wifi network ... its just to see whether you wireless card is having an initializing problem
Remove IPv6.  It is a pain in the rear with Windows.
Kelly W.
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JohnBusiness Consultant (Owner)Commented:
You do not have to remove IPv6 in Windows 7. As I and many others here have pointed out, removing IPv6 is unnecessary in the vast majority of cases.  ... Thinkpads_User
Sorry to disagree with you but I am going to
from many websites about IPv6
"If your internal or external networks do not  require  IPv6 protocol, better remove it under network connection properties. Keeping IPv6 in your computer sometimes slows down network by trying to register IPv6 addresses, or trying to get IPv6 address, or trying to resolve IPv6. Better remove it if it’s not required."
and to then quote Mark Minasi in his forum (and Mark Minasi is one of the premier writers for Microsoft and I would take his word over most anyone when dealing with the inner workings of Microsoft OS's)
"When IPv6 is present it tries to resolve first before IPv4"
Just uncheckmark IPv6 and try it.
Kelly W.
JohnBusiness Consultant (Owner)Commented:
I have read that stuff but I have IPv6 on many client computers and all of my own. It doesn't cause any slowdown in Windows 7, did not in Vista, but I never put it onto XP. I watch the traffic in CommView and I do not see it popping up except for occasionally.

Of course it never hurts to try. But if it were as bad as you say, I certainly would have noticed by now. Try and let us know. ... Thinkpads_User
JohnBusiness Consultant (Owner)Commented:
Thank you for posting the stuff about IPv6. It has caused me to do to some looking around. It looks like (Commview) that IPv6 is only being used for LLMNR  (Local-Link Multicast Name Resolution) to my other Windows 7 machine. It is not showing up externally in any way.  ... Thinkpads_User
Sure no problem.
For all of my clients I automatically turn off IPv6 since I have found that it seemed to cause a lot of slowdown issues on the wireless machines especially.
Kelly W.
mbellettyAuthor Commented:
Would ipv6 be the reason why the wireless does not detect the wireless network though? I hav never had issues with ipv6 in the past??

I will try and let you know how I go
It is very possible if the OS is trying to resolve IPv6 to the WAP before IPv4.
It is a timing issue that is happening and sometimes it works if the resolving goes fast but if the resolving is slow, then it will not work.
Kelly W.
JohnBusiness Consultant (Owner)Commented:
>>> Would ipv6 be the reason why the wireless does not detect the wireless network though? <--- In my view, probably not, as I use wireless most of the time with this Thinkpad I am on now.  It never hurts to try, but IPv6 is properly doing its job on my own wireless computer.  ... Thinkpads_User
mbellettyAuthor Commented:
It is the inbuilt wireless adapter.  A USB plug in one works fine
JohnBusiness Consultant (Owner)Commented:
Thank you. I was pleased to assist and glad the new card is working. ... Thiinkpads_User
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