Serious internet problems: DNS server

This error limit my conection to Internet

Hi Daniel,

Please try the following troubleshooting steps:

1. Flush DNS:
- Click 'Start' icon and type 'cmd' (without quotations) in 'Search programs and files' text box
- Right click 'cmd' and click 'Run as an administrator'
- Click 'yes' to continue (command prompt window appears)
- Type ipconfig /flushdns (Tap )
- Restart the computer
- Open 'command prompt' window again and type 'ipconfig /registerdns' (without quotations)
- Tap < Enter >
- Restart the computer and re-check

2. If the issue persists, try updating the network card drivers:
- Click http://dell.to/Qnizfs to access the 'Download and Drivers' page
- Enter system's 'service tag' to access drivers for your computer
- Select correct 'operating system'
- Expand 'Network'
- Download and install the latest 'ethernet' and 'wireless' drivers
(If you need more support on finding the exact drivers for your laptop, please share the exact system model name and the operating system installed)

3. If the issue continues even after updating the network drivers, temporarily disable the anti-virus firewall. If using Mcafee, right click the Mcafee icon at bottom right corner of the screen (system tray) and select 'change settings'; Disable 'firewall' temporarily to check internet connection

4. If you still experience issues, please provide the following details:
- Click 'Start' icon and type 'cmd' (without quotations) in 'Search programs and files' text box
- Right click 'cmd' and click 'Run as an administrator'
- Click 'yes' to continue (command prompt window appears)
- Type ipconfig /all
- Tap < Enter > (All network details of your laptop will show up on the command prompt window)
- Please paste these details in your post and we will take it forward

Also share the following details:
- Apart from the above mentioned steps, what more troubleshooting have you performed so far?
- Are you facing issues with the 'wireless connections' or with a 'hard wired' connection?
- If you have not tried using a 'hard wired connection', try plugging the laptop with the router/modem directly through an ethernet cable and check internet
- Which anti-virus software is installed in the computer?

Hope this helps. do reply if you have any further questions. I would be glad to assist.

i have tried all you recommended me. Thanks for your help but I'm still with hard wired' connection.

A friend told me that by formating my computer the problem will dissapear. If i format my computer, how i can reinstall windows 7?

Thanks you again !

Daniel95,

Places to look to see if your Connection is enabled

First power cycte your router/modems.