Cant see available wireless networks?

I have two laptops sitting side by side. My computer sees all the available wireless networks broadcasting within range (including my BEFW11S4 4-wired, wireless router). My daughter just turned on her computer for the first time and we are not seeing any "available wireless networks" in range...refresh list doesn't help.
Is there some setting in the computer that I must enable to get her computer to see the wireless networks in range?
thx.

sorry....hit the wrong key and it submitted before finishing....
1. Have linked my daughters computer to WEP enabled wireless signal from Linksys router....that is the good news.
2. bad news is that I still don't see the signal listed on the "view available wireless networks list." The message in the window says:
"Windows cannot configure this wireless connection. If you have enabled another program to manage this wireless connection, use that software. If you want Windows to configure this wireless connection, start the Wireless Zero Configuration (WZC) service. For information about starting the WZC service, see article 871122 in the Microsoft Knowledge Base on the microsoft.com Web site."
I did disable the Windows Firewall and the Norton Firewall as you instructed.
The wireless card is the "802.11g Mini Card Wireless Adapter"
So, my only problem existing on my daughters computer now is that one can't see the wireless signals in range as the "view available wireless networks" list doesn't display anything. However, she is able to connect at free WiFi in town, is now able to connect to my WEP enabled signal in the house.....that is good.
just one last thing to fix and we will be golden....but I don't know what to try next....
And I just clicked my wireless icon to display networks in range and found 3: 1. my WEP enabled network-Connected; 2. Linksys from a neighbor in range that is not protected and is available to link to...; and 3. A computer-to-computer signal probably from both of these computers sitting on the desk next to each other....
any suggestions on what to try next???
thx. greg

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Can no longer see any wireless networks

Hello,
I've had my macbook for just under a year now and have never had a problem seeing/connecting to any wireless networks in the past. However, over the past few days I have had issues connecting to my router. It keeps kicking me off every 15 or 20 minutes and when I try to reconnect it often gives me a timeout error. I have reset the router countless times and have even reset it to factory settings and triple checked that the firmware is up-to-date. I felt it was a router issue until this morning; it kicked me off so I reset my router and turned my airport off&on but now I cannot even see the network nor the other 10 (or so) networks that are typically viable. Since I cannot even see the wireless networks across the block anymore I seems like this has to be a computer issue (or at least the computer has to be involved to some degree).
I've tried to make an appointment at the genius bar but they are booked solid, as in they don't have any available appointments available at any time, even days in the future. Has anyone seen this problem before? Is my wireless card is on the fritz? Does anyone know of any potential software issues that could cause this?
Thanks in advance.

You can skip the Genius Bar and just call AppleCare directly.
However, a couple of suggestions:
• create a new location in your Network preferences; does the problem persist?
• create a new user and log in to that account; does the problem persist?
This one's more extreme: Do an Archive and Install, which will completely reinstall the system but preserve user accounts and data:
http://support.apple.com/kb/HT1545
If these don't help, then it may well be hardware.
Good luck!

Need help here! I'm out of options. Computer can't see the wireless network

Sorry for the novel, but I have to tell you what is going on with my computer. I also need to vent because I’m extremely frustrated. I want to make sure I give as much info as I can we can get this fixed. I’m done with trying to figure this out on my own!!!
I’m having a major issue with the wireless network connection on my desktop. I’ve tried everything and I can’t figure out what it’s doing.
First of all, my wireless router is set up correctly (according to the Sticky), has active security, and works fine. It has nothing to do with the router. I’m sure of it.
Here’s a quick history:
When I was at my first residence in Chicago and bought a Linksys wireless N router in May 2008. My computer was about 30 feet away from the router and everything worked fine. Always found the router and never lost connection.
I moved to a new place in September 2008 and used the same router, computer, etc. at my new place. The computer was only about 7 feet away from the router this time, but I used the wireless connection instead so I wouldn’t have a network cable lying across the floor. At first everything worked fine. No issues. Then, one day out of the blue, my desktop lost connection with the router. My router didn’t even appear as an Available Wireless Network. I rebooted everything and that seemed to fix it. OK, issue fixed, right? Wrong. It did it again the next day. I rebooted everything, but it still couldn’t find my router. It did see lots of other wireless routers in the area though so I know the wireless card was working. It just didn’t see my router.
This went on for a while. Sometimes it would see my router and connect then it would lose it again. I thought maybe it was the router going bad. Well, I have a notebook computer too so I tried it. It has found my router every time and has never lost connection. I had it sitting on top of my desktop even to see if there was some sort of dead spot in my condo, but the notebook found my router just fine.
Sometimes my desktop would see my router, but it wouldn’t be my network name. It would call it “Home” or something. I know it was my network because it was the only network with maximum (Excellent) signal strength. I’m thinking it must be some sort of association issue. For some reason it doesn’t associate my router as an available network. I don’t understand that.
I tried everything: Ad Aware, Live OneCare, registry cleaners, driver updates, restore points, pretty much anything I found in the forums. Nothing worked for long if at all. It’s like my desktop only finds my router when it wants to. Note: The only thing that would work sometimes was if I clicked “Repair.” Sometimes that would work. I finally gave up and connected my desktop via network cable and unhooked my wireless card. I never lost connection as long as it was hard-wired.
The drama continues. I recently moved to Iowa and set up my network here. I’m using the same router, same desktop and wireless card, same notebook computer, etc. I went ahead and tried the wireless card on my desktop again. It worked just fine! No connection issues at all. It connected and stayed connected. I thought, “Well, that’s strange. It must have been something with the condo in Chicago. Oh well!” It worked fine from February 5 until March 10. Now it’s doing it again!!!! The notebook is about 3 feet away and sees the router just fine.
Here are the facts:
I’m using a Linksys WRT300N Wireless-N router.
I’m using a Linksys Wireless-N PCI WMP300N Adapter (about 18 months old).
I’m running Windows XP on the custom built desktop and Windows Vista on the HP notebook.
I built this computer about 5 years ago and have not done any major upgrades for 2-3 years. The only thing I added was the wireless card. I also changed out the HD in January 2009 and did a data migration right before I moved to Iowa in February. All of the networking issues were going on well before I did the data migration though so it has nothing to do with that. In fact, I had my computer hard-wired into my router at the time of the data migration and the wireless worked fine (for a little while) after I moved to Iowa. So if anything, the data migration seemed to help with my wireless connection.
All drivers are up to date.
Using Windows Live OneCare and have run complete scan: nothing found.
Using Ad Aware and have run complete scan: only found cookies and deleted them but didn’t fix issue.
Ran WinsockxpFix but that didn’t help.
Ran TweakNow RegCleaner Standard but that didn’t help.
Right-clicking the wireless icon, I try to view Available Wireless Networks. The window comes up and shows me other wireless networks in the area (2 available right now), but doesn’t show my network at all. I click “Refresh network list” and 1 or 2 of the other networks will come up, but mine is still not shown.
I’ve clicked “Repair” and get this message: “Windows could not finish repairing the problem because the following action cannot be completed: Connecting to the wireless network.”
If I go to Control Panel, there is a Wireless Configuration Utility program from Broadcom. When I open that here is what I find:
It is not managing my wireless networks.
Under the “Wireless Networks” tab I see my Network with an “X” over the router icon to the left of it and a locked security icon to the right of it.
No information under the “Link Status” or “Statistics” tabs.
The “Site Monitor” tab shows my wireless network and the other 2 networks in the area (although they drop in and out because of signal strength). My network is always present even though the signal strength bounces up and down. This tab shows that my network is secure, 802.11 is g and n, speed is 270 mbps, Channel is 9, and Signal bounces from orange/red to green. Data encryption is (m)TKIP, TKIP, WPA-PSK.
I was going to use my notebook to post this message since it has been connected for 2 days without ever losing connection. It shows Very Good signal strength and is about 3 feet away from my desktop.
Update: My desktop just connected to my network after sitting there for 2 hours. Good to Very Good signal. Broadcom tool shows the connection and now has information in the Link Status and Statistics tabs.
Cancel that. It just lost connection again. It was only connected for about 5 minutes. There is no change in signal strength according to Broadcom though. In fact, Broadcom shows better signal now that I lost connection.
Now, it just connected again (on its own) after sitting there for 10 minutes! I’ve been surfing the web on my desktop for 45 minutes now and I’m using my desktop to post this message. What the heck?!!! This is what it’s like. Aggravating huh?
Well, that’s all I can think to write. What else do you need? Can anybody help me with this?
I’m confused. Please help!
Thanks a lot!!!
Jake
Message Edited by JakeT on 03-12-2009 02:54 PM

Thanks but it's just my desktop that doesn't see it though. My notebook sees it everytime, even at the same exact time that my desktop doesn't see it. For example yesterday when I was typing up this post, I was typing up the post on my notebook because my desktop didn't see the router. I don't think it has anything to do with the router actually, but I wanted to see if anyone on here has encountered this issue before. Other forums have similar issues but I've tried all of the fixes I found elsewhere and they didn't work.
Any other ideas?
Thanks!

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I am bringing up a new AE in my wireless network. I have set all the internet and wireless configurations. I am trying to add it as a client, initially connected to my router via ethernet. After tweaking several settings I am now down to what seems like a critical problem: Airport Utility tells me that my AE cannot see the wireless network. This is a bit amusing since I unplugged the ethernet and am communicating with it solely via wireless.
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Bye

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