Internet fails-DNS error?

There was one website I would go to and it wouldpop up saying dns error, I figured just alot of people wer egetting on or just out. Every now and then it does this- NOW it's doing this for facebook but not the other site. What's going on? Sometimes it does it and sometimes it doesn't but its never done this before.

2009-08-06T06:34:21Z

xp-internet 8

2009-08-06T06:43:31Z

i've ran all scans-nothing

Sir Jam2009-08-06T06:31:45Z

Favorite Answer

For Vista and Windows 7
Start - All Programs - Accessoried - right click Command Prompt and select Run as Administrator.
When Command Prompt comes up, type
ipconfig /flushdns
and press ENTER

Arbaaz2009-08-06T06:36:36Z

Run system scan by using Malwarebytes http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html?part=dl-10804572&subj=dl&tag=button

Good Luck