Limited or No connectivity problem
I am sorry to hear what happened but getting internet connection is important this days. I am technical support associate so i can definitely give you some tips for reinstating the connection.
As you have mentioned above, you have powered down everything but it still shows limited or no connectivity but here's what you can try. The resolution/s i will be providing will be very detailed so i do appreciate your time reading on my tips.
1. Click on Start button and Go to Control Panel.
2. Select Network and Internet and Click on Network & Sharing Center.
3. A. If you look at the upper left inside Network & Sharing Center, select on Manage Wireless Connection.
B. If you're on a wired connection, just click on Manage Network Connection and on the next window, right click on the Local area connection and hit on disable.
4. A. On the next window, you should see your wireless network. Click on it and Remove it from the list of available network from your pc.
B. Right click again on Local Area connection and select enable. Once it says connected, immediately check for internet.
5. Restart your pc. Once it's powered up, click on Start button again and this time go to Connect to a network. This time you should see your own wireless connection and just click on Connect and if you have a wireless password, you may enter the answer and once you get a prompt that you are connected then check if you are connected to the internet.
If your pc is still connected to the wired connection or to wireless connection, then:
1. Go to Network & Sharing Center and Click on Manage Network Connection (Windows Vista) and Change Adapter Settings (Windows 7).
2. A. Under Wireless Area Network, right click and select disable.
B. Under Local Area Network. Right click and select disable.
3. A. Once it's disabled, right click on the same icon and click enable.
B. Once it's disabled, right click Local Area connection and click on enable.
4. Your pc should be enabling the wireless configuration and acquiring internet connection or If you're on a Wired connection then, it should say connected and verify if you have internet connection.
5. Once you get the wireless area network connected, check if you have internet connection.
The next step would be an advance troubleshooting:
Setting your pc into static ip and thus your connectivity issue should not persist. The process requires a lot of patience.
1. If you have internet access, go back to Local Area Connection icon and click on it.
2. A pop up box will give you a details button, click on it and look for the Default gateway like 192.168.x.xx and save it on a paper or a notepad.
3. Close the pop up box and then right click on Local Area Network and Select on Properties.
4. A new box will open and you need to look for Internet Protocol (TCP/IP) and you need to click on it as it will turn to blue line.
5. Click on the Properties button (across Install, Uninstall buttons).
6. On the new pop up box, Select on the bullet "Use the following ip address" and then first box will ask you for the IP ADDRESS, if you could remember the default gateway you saved, the IP address should be the same on the first 3 dots (e. g default gateway was 192.168.1.1 then your IP address should be 192.168.1.20, the last 2 digits can be your choice from numbers 2 – 254).
7. Moving on, your Subnet Mask is 255.255.255.0.
8. Default gateway will be what you found earlier (e. g 192.168.1.1 or 192.168.0.1).
9. Next, you have to select the second bullet "Use the following DNS server addresses".Primary DNS server is the same as to your default gateway again (e. g 192.168.1.1 or 192.168.0.1) and your Secondary DNS server should be 188.8.131.52 (universal DNS).
10. Once you're done entering all data, make sure to click on OK.
11. Close all boxes and windows on your pc and you should still be connected to the internet.
Same goes to wireless connection. You just have right click on Wireless Area Connection and go to Properties and follow the same steps.
Hope this helps your concern.