Wireless Network Connection doesn't have a valid IP configuration

The fact that your network only shows the bars with no shield means that it IS encrytped -- which is consistent with your having to type in your password.

The possible causes of this problem appear to be:

1. A firewall or other security software on your computer blocking outgoing connections
2. Malware on your computer blocking outgoing connections
3. Security settings on your router blocking your computer

So ...

What is the name and version of your antivirus program?

What other security software is installed on your computer?

What is the make and model of your router?

Given your statement that all of this started when you switched Internet providers and got a new modem/router, I'm inclined to believe that the problem is in your router.  I'm not confident that I can find a solution for you if the ISP techs couldn't (presumably, they are familiar with the modem/routers supplied by their own company), but if you identify the make and model of the router, I'll see if I can come up with something.  Otherwise, I'm sorry to say that I'm out of ideas.

Yes, I did the numbered steps. 

I could not find the encryption setting in the router configuration utility, so it was just on the computer. The network shows just the bars. The problem just happened again, through the Local Area Connection (plugged directly into the modem)

1.  Did you read -- and follow -- the numbered steps I added at the top of my earlier Reply?

2.  Your ipconfig results look a lot better than before.

3.  Does

When I changed the Security Type to No Authentication, I also changed the "Encryption type" to "None."

refer to changes you made on your computer (rather than in the router's configuration utility)?  I assume it does, and if so, although you couldn't find anything enabled about encryption in your router's configuration utility, the fact that you were asked for a wifi password means that encryption was still enabled.  When you click on the wifi icon to see available wireless networks, does your network show a shield icon or just the bars:

That ipconfig information is the same for when there is a connection, and when there's not.

I managed to get into the router configuration utility, but couldn't find a specific wireless encryption setting. Everything that mentioned encryption was already disabled. When I changed the Security Type to No Authentication, I also changed the "Encryption type" to "None." I was able to connect to my wireless network, but it still asked for my password. Not sure if it matters. Here is the ipconfig...no Autoconfiguration...

Microsoft Windows [Version 6.1.7601]

Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\Meghan>ipconfig/all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : Meghan-HP

   Primary Dns Suffix  . . . . . . . :

   Node Type . . . . . . . . . . . . : Hybrid

   IP Routing Enabled. . . . . . . . : No

   WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Ralink RT5390 802.11b/g/n WiFi Adapter

   Physical Address. . . . . . . . . : 38-59-F9-2E-5F-14

   DHCP Enabled. . . . . . . . . . . : Yes

   Autoconfiguration Enabled . . . . : Yes

   IPv4 Address. . . . . . . . . . . : 192.168.0.4(Preferred)

   Subnet Mask . . . . . . . . . . . : 255.255.255.0

   Lease Obtained. . . . . . . . . . : Monday, June 30, 2014 8:22:15 PM

   Lease Expires . . . . . . . . . . : Monday, June 30, 2014 9:30:45 PM

   Default Gateway . . . . . . . . . : 192.168.0.1

   DHCP Server . . . . . . . . . . . : 192.168.0.1

   DNS Servers . . . . . . . . . . . : 65.32.5.111

                                       65.32.5.112

   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Realtek PCIe FE Family Controller

   Physical Address. . . . . . . . . : 10-1F-74-BA-25-34

   DHCP Enabled. . . . . . . . . . . : Yes

   Autoconfiguration Enabled . . . . : Yes

   Link-local IPv6 Address . . . . . : fe80::893c:27db:5902:a6ed%11(Preferred)

   IPv4 Address. . . . . . . . . . . : 192.168.0.2(Preferred)

   Subnet Mask . . . . . . . . . . . : 255.255.255.0

   Lease Obtained. . . . . . . . . . : Monday, June 30, 2014 8:22:13 PM

   Lease Expires . . . . . . . . . . : Monday, June 30, 2014 9:22:12 PM

   Default Gateway . . . . . . . . . : 192.168.0.1

   DHCP Server . . . . . . . . . . . : 192.168.0.1

   DHCPv6 IAID . . . . . . . . . . . : 235937652

   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-16-8F-30-5E-10-1F-74-BA-25-34

   DNS Servers . . . . . . . . . . . : 65.32.5.111

                                       65.32.5.112

   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.westell.com:

   Media State . . . . . . . . . . . : Media disconnected

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Microsoft ISATAP Adapter

   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0

   DHCP Enabled. . . . . . . . . . . : No

   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 11:

   Media State . . . . . . . . . . . : Media disconnected

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Microsoft 6to4 Adapter

   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0

   DHCP Enabled. . . . . . . . . . . : No

   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Media State . . . . . . . . . . . : Media disconnected

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface

   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0

   DHCP Enabled. . . . . . . . . . . : No

   Autoconfiguration Enabled . . . . : Yes

C:\Users\Meghan>

You don't indicate whether you believe that the ipconfig information you provided is when you have a usable Internet connection or not. 

EDIT -- Before doing the steps below, do the following numbered steps

1. Open an Elevated Command Prompt (search for cmd.exe then right-click on the link and "Run as administrator -- comply with the UAC prompt)
2. Type the following commands in the Command Prompt window and press Enter after each line
   • netsh winsock reset catalog
   • netsh int ipv4 reset reset.log
   • netsh int ipv6 reset reset.log
3. Reboot the computer

Now continue with the following

That ipconfig information shows that you are NOT properly connected to the modem/router.  The IP address for your wireless adapter

     Autoconfiguration IPv4 Address. . : 169.254.247.50(Preferred)

is what's called an "Automatic Private IP Addressing" (APIPA) address, and this is what Windows assigns when the adapter (wired or wireless) is configured to obtain an IP address automatically (the usual default) but for some reason is unable to obtain an IP address.

The usual reason for this -- for wireless connections -- is misconfigured wireless encryption.  To test this, connect a computer to your modem/router with an Ethernet cable and access the router's web configuration utility.  Find the setting for wireless encryption and completely disable it (this will only be temporary).  If you don't know how to do this, provide the make and model of your router and I'll try to find a manual for it.

After you have turned off encryption in the router, open the Network and Sharing Center on your computer and click the link to "Manage Wireless Networks."  At the Manage Wireless Networks screen, double-click your network to open its "Properties" page and click the "Security" tab.  Change the "Security type" to "No authentication (open)" and OK your way out.

Now see if you can connect.  Assuming you can connect, run the ipconfig /all command again, and this time the you should see something like the following for your wireless LAN adapter -- note the two lines in bold below.  Please report what you see for "IPv4 Address" and that it does NOT have the word "Autoconfiguration" before it.

 Connection-specific DNS Suffix  . :

 Description . . . . . . . . . . . : Ralink RT5390 802.11b/g/n WiFi Adapter

 Physical Address. . . . . . . . . : 38-59-F9-2E-5F-14

 DHCP Enabled. . . . . . . . . . . : Yes

 Autoconfiguration Enabled . . . . : Yes

Link-local IPv6 Address . . . . . : fe80::30b9:48bb:e715:73f5%11(Preferred)

IPv4 Address. . . . . . . . . . . : 192.168.1.104(Preferred)

 Subnet Mask . . . . . . . . . . . : 255.255.255.0

 Lease Obtained. . . . . . . . . . : Thursday, July 03, 2014 8:19:48 PM

 Lease Expires . . . . . . . . . . : Saturday, July 05, 2014 11:01:34 AM

 Default Gateway . . . . . . . . . : 192.168.1.1

 DHCP Server . . . . . . . . . . . : 192.168.1.1

 DHCPv6 IAID . . . . . . . . . . . : 247226356

 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-57-15-E5-BC-5F-F4-3A-E7-2F

 DNS Servers . . . . . . . . . . . : 65.32.5.111

                                       65.32.5.112

 NetBIOS over Tcpip. . . . . . . . : Enabled