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Old 08-11-2011, 03:37 PM   #1
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Default Help! Computer will no longer hook up to my WiFi

I have an older computer that I use for downloading and it worked well till last week.We bought an Ipad and had trouble hooking it up - I changed the password to our WiFi network and ended up having to change a setting on the modem to DHCP to get the Ipad to access it.

Now, the older PC wont access the net. My newer laptop still connects no problem but not the older PC. I type in the new pword and it just sits there accessing but wont connect.

Any ideas?
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Old 08-11-2011, 03:55 PM   #2
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Default Re: Help! Computer will no longer hook up to my WiFi

I had this exact same problem on a newer laptop. What operating system is the old PC running?

Edit: So you logged off right around the time I posted so you most likely didn't see my question. Basically though, what is happening is the settings for the WAP (Wireless Access Point) are already stored in a wireless profile on your OS. When you changed the settings, it doesn't force each device to 'discover' the new settings of the WAP. So you have to go into the Network connection properties and delete the profile for the WAP. You can then 'rediscover' the network settings of the WAP by re-connecting to the network. It should be noted that when I had this problem, from doing the same thing (changing settings on my WAP) simply deleting and reconnecting wouldn't work as the settings were stored in either the registry or RAM (not sure which) as the WAP has the same SSID... thus recreating the same profile, I assume that it's just importing the settings from the previous profile even though you deleted it. I had to shut down my laptop and remove the battery to clear the RAM (don't know if simply shutting down will do the trick but unplugging the system for about 5-10 minutes will). If you're not familiar with getting into the Wireless profiles to delete a profile, you can follow the directions here based on the OS. There is another way to 'update' the connection profile settings by selecting the Wireless Profile properties, but the easiest way is to simply Delete the profile > Shut down > Restart > Connect to the Network and rediscover the settings. Let me know if this doesn't work but I'm 99% sure it will.

Edit2: You also mentioned that you enabled DHCP on the router, so you may have the Old PC set to a static IP address that's now inside the defined DHCP range. If the above doesn't work, let me know and I can walk you through fixing that scenario.
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Old 08-11-2011, 04:38 PM   #3
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Default Re: Help! Computer will no longer hook up to my WiFi

iPwn has done it again...
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Old 08-11-2011, 04:53 PM   #4
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Default Re: Help! Computer will no longer hook up to my WiFi

Wow, thanks for the detailed reply. I'm stationed in Belgium so it's real late here - will try this this weekend and let you know.

Thanks again!
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Old 08-13-2011, 07:13 PM   #5
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Default Re: Help! Computer will no longer hook up to my WiFi

So you sent me a PM that the above didn't work and you're running Windows XP. Open a command prompt by going to Start > Run > type CMD and press enter. Now in the command prompt type ipconfig and press enter. Copy the text by selecting it, right clicking (as you can't simply use CTRL+C in the command prompt) and then selecting Copy. Paste that into here.
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Old 08-15-2011, 11:47 AM   #6
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Default Re: Help! Computer will no longer hook up to my WiFi

I got it fixed - your original fix worked, I just needed to leave the computer unplugged longer for it to dump everything.

Thanks for your suggestion - without it, I would have junked her and bought a new one.

Much appreciated!
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