Ubuntu Networking :: 11.04 - DNS Errors / Webpage Not Available

I have recently upgraded to the new ubuntu 11.04 but am having problems with the internet. Often When I try to access a website it takes a long time (5-10 minutes) to load even google, and sometimes I just get the following error message:
This web page is not available. The server at google.com can't be found because the DNS lookup failed. DNS is the web service that translates a website's name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server or a firewall preventing Chromium from accessing the network.

Here are some suggestions:
- Reload this web page later.
- Check your Internet connection. Reboot any routers, modems or other network devices that you may be using.
- Check your DNS settings. Contact your network administrator if you're not sure what this means.
- Try disabling DNS prefetching by following these steps: Go to Spanner menu > Preferences > Under the Bonnet and deselect "Use DNS pre-fetching to improve page load performance".
- Try adding Chromium as a permitted programme in your firewall or antivirus software's settings. - If it is already a permitted programme, try deleting it from the list of permitted programmes and adding it again.
- If you use a proxy server, check your proxy settings or check with your network administrator to make sure that the proxy server is working.
- If you don't believe that you should be using a proxy server, try the following steps: Go to Spanner menu > Options > Under the Hood > Change proxy settings and make sure that your configuration is set to "no proxy" or "direct".
Error 105 (net::ERR_NAME_NOT_RESOLVED): Unable to resolve the server's DNS address.

I have tried to access the internet using Chrome, Firefox, Konqueror, on the Untiy Desktop, and the Classic Desktop. I've checked my Proxy settings in Chrome (My main browser) and its set to direct internet connection. I've Disabled the UFW. I've edited the resolv.conf which initially showed:

Code:
# Generated by NetworkManager
domain HG532.com
search HG532.com
nameserver 10.0.0.1
and edited it to:

Code:
# Generated by NetworkManager
domain 10.0.0.1
search 10.0.0.1
nameserver 10.0.0.1
and even tried the Google DNS server:

Code:
# Generated by NetworkManager
domain 8.8.8.8
search 8.8.8.8
nameserver 10.0.0.1

But nothing works. It seems like When I initially log on to the internet it runs fine, but over the coarse of 10 minutes the page loading times go down then eventually I just get the above error message. There are other computers here running windows which connect through the same wireless fine.